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 A144277 #6 Jul 02 2023 12:47:36 %S A144277 1,2,14,100,1140,14880,249280,4801280,108574400,2767072000, %T A144277 79286592000,2508856627200,87115395136000,3287694620672000, %U A144277 134073047499776000,5872147278807040000,274939690654024704000,13701683362561818624000,724128149433185136640000 %N A144277 Second column (m=2) of triangle S2hat(-2) = A144275. %F A144277 a(n) = A144275(n+2,2), n>=0. %Y A144277 Cf. A144275, A008544 (m=1 column), A144278 (m=3 column). %K A144277 nonn,easy %O A144277 0,2 %A A144277 _Wolfdieter Lang_, Oct 09 2008