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 A365204 #10 Sep 25 2023 07:30:09
%S A365204 1,145,1009,3745,10081,22321,43345,76609,126145,196561,293041,421345,
%T A365204 587809,799345,1063441,1388161,1782145,2254609,2815345,3474721,
%U A365204 4243681,5133745,6157009,7326145,8654401,10155601,11844145,13735009,15843745,18186481
%N A365204 Centered icositetrachoral numbers.
%C A365204 A icositetrachoral number is a centered figurate number that represents a icositetrachoron, which is a four-dimensional regular polytope composed of 24 cells.
%C A365204 One of the 6 centered regular polichoral (centered pentachoral, centered hexadecachoral, centered octachoral, centered icositetrachoral, centered hexacosichoral and centered hecatonicosachoral) numbers.
%H A365204 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FigurateNumber.html">Figurate Number</a>.
%H A365204 Wikipedia, <a href="https://en.wikipedia.org/wiki/24-cell">24-cell</a>.
%H A365204 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-10,10,-5,1).
%F A365204 a(n) = 24*n^4 - 48*n^3 + 48*n^2 - 24*n + 1.
%F A365204 G.f.: x*(1 + 140*x + 294*x^2 + 140*x^3 + x^4)/(1 - x)^5. - _Stefano Spezia_, Aug 26 2023
%t A365204 Table[24*n^4 - 48*n^3 + 48*n^2 - 24*n + 1, {n, 1, 100}]
%Y A365204 Cf. A362863, A365205, A365206.
%K A365204 nonn,easy
%O A365204 1,2
%A A365204 _Léo Cymrot Cymbalista_, Aug 25 2023