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 A144282 #5 Jul 03 2023 14:52:43 %S A144282 1,3,30,294,4599,81081,1837836,47609100,1449052605,49597258095, %T A144282 1908702935370,81045039516210,3775424041048275,191061229964098725, %U A144282 10445176764205306200,613084928455370309400,38459158233446064893625,2567221442902306374982875 %N A144282 Second column (m=2) of triangle S2hat(-3) = A144280. %F A144282 a(n) = A144280(n+2,2), n>=0. %Y A144282 Cf. A144280, A008545 (m=1 column), A144283 (m-3 column). %K A144282 nonn,easy %O A144282 0,2 %A A144282 _Wolfdieter Lang_, Oct 09 2008