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 A099186 #17 Jun 09 2023 10:59:24 %S A099186 1,12,3972,156624027132,9605393649115032262909140007773492, %T A099186 2215570185245038872814956021479696635481690776469126111743280383568619886232750745465064720338596867052 %N A099186 a(0) = 1, a(1) = 12, a(n+1) = A006564(a(n)). %H A099186 H. K. Kim, <a href="http://dx.doi.org/10.1090/S0002-9939-02-06710-2">On Regular Polytope Numbers</a>, Proc. Amer. Math. Soc. 131 (2003), 65-75. <a href="http://www.ams.org/mathscinet-getitem?mr=1929024">MR 1929024</a> %e A099186 a(2) = A006564(a(1)) = A006564(12) = 12*(5*12^2 - 5*12 + 2)/2 = 3972. %Y A099186 Cf. A007501, A006564. %K A099186 easy,nonn %O A099186 0,2 %A A099186 _Jonathan Vos Post_, Nov 15 2004 %E A099186 Definition and comments condensed by _R. J. Mathar_, Sep 09 2009