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 A144888 #6 Jul 02 2023 15:21:48 %S A144888 1,4,36,200,1720,12480,118560,1081920,11793600,131443200,1658764800, %T A144888 21990528000,319711795200,4922394624000,81508654080000, %U A144888 1428114530304000,26582538673152000,521466739605504000,10779099461222400000,233753593186713600000,5310546788872765440000 %N A144888 Second column (m=2) of triangle A144886 (S1hat(4)). %F A144888 a(n) = A144886(n+2,2), n>=0. %Y A144888 Cf. A144886, A001715 (first column), A144889 (third column). %K A144888 nonn,easy %O A144888 0,2 %A A144888 _Wolfdieter Lang_, Oct 09 2008