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 A180369 #3 Mar 30 2012 18:40:08 %S A180369 1,5040,665280,29059430400,8892185702400,1561112121913344000, %T A180369 423456034182935917363200000,368406749739154248105984000000, %U A180369 516657398319307246483332566876160000000 %N A180369 A177771(n+3)/6! . %F A180369 a(n) = sqrt( A177926(n+3) )/720. %Y A180369 Cf. A178056. %K A180369 nonn %O A180369 1,2 %A A180369 _Giovanni Teofilatto_, Aug 31 2010 %E A180369 Parentheses and indices corrected - _R. J. Mathar_, Sep 03 2010