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 A144349 #6 Jul 04 2023 13:06:30 %S A144349 1,15,295,7425,229405,8423415,358764175,17398082625,946762033525, %T A144349 57141470006775,3788581132110775,273749937606770625, %U A144349 21411992601604730125,1802522188780330392375,162501272634914703865375,15620379109661843174282625,1594837561754271113467313125 %N A144349 Second column (m=2) of triangle S2p(-5) = A013988. %F A144349 a(n) = A013988(n+2,2), n>=0. %Y A144349 Cf. A013988, A008543(n-1) (m=1 column), A144350 (m=3 column). %K A144349 nonn,easy %O A144349 0,2 %A A144349 _Wolfdieter Lang_, Oct 09 2008