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 A144889 #7 Jun 02 2025 00:36:55 %S A144889 1,4,36,264,2040,16000,149600,1362240,14326080,158438400,1931731200, %T A144889 25155648000,357727910400,5420614348800,88408793088000, %U A144889 1532112261120000,28238983686144000,549825606070272000,11292931674759168000,243644152971018240000,5511211980392079360000 %N A144889 Third column (m=3) of triangle A144886 (S1hat(4)). %F A144889 a(n) = A144886(n+3,3), n>=0. %Y A144889 Cf. A144888 (second column). %K A144889 nonn,easy %O A144889 0,2 %A A144889 _Wolfdieter Lang_, Oct 09 2008