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 A097322 #3 Apr 30 2014 01:28:34 %S A097322 1,4,1,1,4,1,1,4,1,11,4,1,1,4,11,1,4,31,1,44,29,1,4,1,11,4,29,1,4,11, %T A097322 1,4,31,1,1276,1,41,4,1,11,116,1,1,292,11,1,4,31,127571,44,1,1,4,1, %U A097322 319,4,41,1,4,11,1,4,899,1,44,1,1,4,29,11,4,1,1,4,583,1,4756,361429 %N A097322 (2n)! divided by denominator of Taylor expansion of exp(cos(x)-1). %o A097322 (PARI) a(n)=(2*n)!/denominator(polcoeff(Ser(exp(cos(x)-1)),2*n)) %Y A097322 Equals A010050(n) / A047690(n). %Y A097322 Cf. A005046. %K A097322 nonn,easy %O A097322 1,2 %A A097322 _Ralf Stephan_, Aug 08 2004