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 A338494 #6 Feb 16 2025 08:34:00 %S A338494 1,2,3,4,5,1,2,3,4,5,6,2,3,4,5,6,7,1,2,3,4,5,6,2,3,4,5,6,7,3,4,5,6,7, %T A338494 8,2,3,4,5,1,2,3,4,5,6,2,3,4,5,6,7,3,4,3,4,5,6,2,3,4,5,6,7,3,4,5,6,7, %U A338494 8,4,5,4,5,6,1,2,3,4,5,2,2,3,4,5,6,3,3,4,5,5,6,4,2,3,4,5,6,3,3,4,5 %N A338494 Least number of pentagonal pyramidal numbers needed to represent n. %H A338494 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PentagonalPyramidalNumber.html">Pentagonal Pyramidal Number</a> %H A338494 <a href="/index/Ps#pyramidal_numbers">Index to sequences related to pyramidal numbers</a> %Y A338494 Cf. A002411, A100878, A104246, A338491, A338493, A338495. %K A338494 nonn %O A338494 1,2 %A A338494 _Ilya Gutkovskiy_, Oct 30 2020