Math::N...bonacci(3)

💖 Math::N...bonacci — the manual, but make it cute 💖

okay bestie so this is a page from User Contributed Perl Documentation, and it's all about Math::N...bonacci ✨ (the manpage header literally abbreviates it like that, iykyk). Buckle up, we're doing math but it's fun math 🎀

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🌸 NAME 🌸

Math::NumSeq::Tribonacci — Tribonacci numbers, yes it's exactly what it sounds like 💅

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✨ SYNOPSIS ✨

the whole vibe, verbatim:

use Math::NumSeq::Tribonacci;
my $seq = Math::NumSeq::Tribonacci->new;
my ($i, $value) = $seq->next;

that's it. that's the intro. go off 👑

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🦋 DESCRIPTION 🦋

so the Tribonacci sequence is 0, 0, 1, 1, 2, 4, 7, 13, etc 🍓

and the rule? the rule is:

T(i) = T(i-1) + T(i-2) + T(i-3)

not me adding three previous terms instead of two 😭 Fibonacci could never. and it all starts from 0,0,1. periodt.

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💅 FUNCTIONS 💅

heads up bestie: peep "FUNCTIONS" in Math::NumSeq for the behaviour that's common to all the sequence classes, because this one is not special like that 🫶

• $seq = Math::NumSeq::Tribonacci->new () — makes you a brand new sequence object and hands it over. iconic behaviour honestly ✨

🔥 Random Access 🔥

• $value = $seq->ith($i) — gimme the $i'th Tribonacci number, thank you very much 💖
• $bool = $seq->pred($value) — returns true if $value is a Tribonacci number. a vibe check, basically 🌈
• $i = $seq->value_to_i_estimate($value) — gives you an estimate of the i that goes with $value. estimate. not a promise. don't come for her 👀

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👑 SEE ALSO 👑

• Math::NumSeq
• Math::NumSeq::Fibonacci

(the original classic. respect where it's due.)

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🌈 HOME PAGE 🌈

<http://user42.tuxfamily.org/math-numseq/index.html>

go click it, she's got lore 🧚

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💜 LICENSE 💜

Copyright 2010, 2011, 2012, 2013, 2014, 2016, 2019, 2020 Kevin Ryde

Math-NumSeq is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Math-NumSeq is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Math-NumSeq. If not, see <http://www.gnu.org/licenses/>.

no cap: that warranty disclaimer is doing heavy lifting, bestie. read it. it means what it says 💀

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and that's the whole page 🎀 this was perl v5.42.0, dated 2025-07-25, and yes the manpage footer really does say Math::N...bonacci(3) like it got cut off mid-sentence — main character energy fr fr, we love a mysterious abbreviation 💖✨