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 A144344 #14 Jul 04 2023 08:15:42 %S A144344 1,5,80,1210,29205,782595,27002800,1058476100,48782479625, %T A144344 2522622197425,146681902699200,9401689444974750,661001092169312125, %U A144344 50460675421190255375,4160330180022220820000,368146438283724242989000,34808031903090390296900625 %N A144344 Second column (m=2) of triangle S2hat(-5) = A144342. %F A144344 a(n) = A144342(n+2,2), n>=0. %Y A144344 Cf. A144342, A008543 (m=1 column). %K A144344 nonn,easy %O A144344 0,2 %A A144344 _Wolfdieter Lang_, Oct 09 2008