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 A061315 #7 Aug 11 2012 12:12:26 %S A061315 1,1,2,1,3,3,1,5,6,4,1,10,16,10,5,1,28,76,40,15,6,1,154,1216,430,85, %T A061315 21,7,1,3520,247456,37324,1870,161,28,8,1,1551880 %N A061315 Array read by antidiagonals: T(n,k)=T(n,k-1)*(T(n,k-1)+k-1)/k with T(n,1)=n. %C A061315 Not always an integer %F A061315 a(n) =A061314(n, k-1)/k %e A061315 1,1,1,1,1,1,1,1,1,1,... %e A061315 2,3,5,10,28,154,3520,1551880,267593772160,7160642690122633501504,... %e A061315 3,6,16,76,1216,247456,61235956672/7,468730299066952899064/49,... %e A061315 4,10,40,430,37324,232211266,7703153350084336,7417321441864447837991470393906, %e A061315 5,15,85,1870,700876,81871778626,957569733696568731376,... %e A061315 6,21,161,6601,8719921,12672844307641,22942997549397847673832961,... %e A061315 7,28,280,19810,78503068,1027122012987994,... %Y A061315 Rows include A000012 and A003504. Columns include A000027, A000217, A006007, A061319 and A061321. %K A061315 nonn,tabl %O A061315 1,3 %A A061315 _Henry Bottomley_, Apr 24 2001