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 A060057 #7 May 11 2025 09:14:49 %S A060057 1,70,5376,508640,59835776,8658773760,1519012888576,318434742599680, %T A060057 78726332782411776,22686646587991654400,7541693844185862373376, %U A060057 2865717052710927775825920,1234612260068935283167461376,598705789750919858580870922240 %N A060057 Nonzero numbers in expansion of ((tan(x))^5)/5! in (x^n)/n!. %F A060057 a(n) = A059419(5+2*n,5). %o A060057 (PARI) a059419(n, k) = n!*polcoef(tan(x+x*O(x^n))^k/k!, n); %o A060057 a(n) = a059419(2*n+5, 5); \\ _Seiichi Manyama_, May 11 2025 %Y A060057 A059419 (fifth column without zeros), A059420, A060056. %K A060057 nonn,easy %O A060057 0,2 %A A060057 _Wolfdieter Lang_, Mar 16 2001