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 A338496 #4 Oct 31 2020 07:07:13 %S A338496 1,2,3,4,5,6,7,8,1,2,3,4,5,6,7,8,9,2,3,4,5,6,7,8,9,10,3,4,5,1,2,3,4,5, %T A338496 6,4,5,6,2,3,4,5,6,7,5,6,7,3,4,5,6,7,8,6,7,8,4,5,6,2,3,4,5,6,7,5,6,7, %U A338496 3,1,2,3,4,5,6,7,8,4,2,3,4,5,6,7,8,9,5,3,4,3,4,5,6,7,8,6,4,5,4,2,3 %N A338496 Least number of octagonal pyramidal numbers needed to represent n. %H A338496 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PyramidalNumber.html">Pyramidal Number</a> %H A338496 <a href="/index/Ps#pyramidal_numbers">Index to sequences related to pyramidal numbers</a> %Y A338496 Cf. A002414, A104246, A338458, A338481, A338493, A338494, A338495. %K A338496 nonn %O A338496 1,2 %A A338496 _Ilya Gutkovskiy_, Oct 31 2020