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 A061321 #2 Mar 30 2012 18:51:34 %S A061321 0,1,28,1216,37324,700876,8719921,78503068,547643916,3114359073, %T A061321 14992411852,62860750876,234647983648,793316418076 %N A061321 Column 5 of A061315. %F A061321 a(n) =A061320(n)/5. %K A061321 nonn %O A061321 0,3 %A A061321 _Henry Bottomley_, Apr 24 2001