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 A321450 #15 Feb 16 2025 08:33:57 %S A321450 0,1,6,7,18,24,25,40,58,64,65,75,115,126,133,139,140,196,201,241,259, %T A321450 265,266,288,322,397,405,437,455,461,462,484,550,610,685,693,725,726, %U A321450 743,749,750,889,936,955,1015,1090,1130,1148,1154,1155,1183,1243,1276,1439 %N A321450 Numbers that are sums of consecutive pentagonal pyramidal numbers (A002411). %H A321450 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PentagonalPyramidalNumber.html">Pentagonal Pyramidal Number</a> %Y A321450 Cf. A001296, A002411, A319184, A322468, A322479, A322638, A322651, A322652, A322653. %K A321450 nonn %O A321450 1,3 %A A321450 _Ilya Gutkovskiy_, Dec 21 2018