This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A359877 #7 Feb 16 2025 08:34:04
%S A359877 1,2,4,8,56,108,5536,28074040,39648,147312,18566888967365603514688,
%T A359877 9966792788887776,2775641472,2505471397838180985096739296,
%U A359877 1445523368993397560000765219760086502994234237205516083525719052320,44092571484448511101335177770183225655413760
%N A359877 a(n) is the smallest tetranacci number (A000078) with exactly n prime factors (counted with multiplicity).
%H A359877 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PrimeFactor.html">Prime Factor</a>
%H A359877 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TetranacciNumber.html">Tetranacci Number</a>
%e A359877 a(6) = 5536, because 5536 is a tetranacci number with 6 prime factors (counted with multiplicity) {2, 2, 2, 2, 2, 173} and this is the smallest such number.
%Y A359877 Cf. A000078, A001222, A072397, A359849, A359876, A359879.
%K A359877 nonn
%O A359877 0,2
%A A359877 _Ilya Gutkovskiy_, Jan 16 2023