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 A338493 #6 Feb 16 2025 08:34:00 %S A338493 1,2,3,4,1,2,3,4,5,2,3,4,5,1,2,3,4,5,2,3,4,5,6,3,4,5,6,2,3,1,2,3,3,4, %T A338493 2,3,4,4,5,3,4,3,4,2,3,4,4,5,3,4,5,5,6,4,1,2,3,3,4,2,3,4,4,5,3,4,5,5, %U A338493 2,3,4,4,5,3,4,5,5,6,4,5,6,6,3,4,2,3,4,4,5,3,1,2,3,4,4,2,3,4,3,4,3 %N A338493 Least number of square pyramidal numbers needed to represent n. %H A338493 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SquarePyramidalNumber.html">Square Pyramidal Number</a> %H A338493 <a href="/index/Ps#pyramidal_numbers">Index to sequences related to pyramidal numbers</a> %Y A338493 Cf. A000330, A002828, A104246, A338484, A338494, A338495. %K A338493 nonn %O A338493 1,2 %A A338493 _Ilya Gutkovskiy_, Oct 30 2020