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 A061135 #4 May 10 2013 12:44:45 %S A061135 0,0,0,0,0,0,0,0,9072,90720,498960,25945920,321080760,2460970512, %T A061135 14552417880,115251776640,4603779180000,72193873752000, %U A061135 681167139805152,16976210865344640,304992335584165320,4548189212204243760 %N A061135 Number of degree-n even permutations of order exactly 10. %F A061135 E.g.f.: exp(x) - 1/2*exp(x + 1/2*x^2) - 1/2*exp(x - 1/2*x^2) - exp(x + 1/5*x^5) + 1/2*exp(x + 1/2*x^2 + 1/5*x^5 + 1/10*x^10) + 1/2*exp(x - 1/2*x^2 + 1/5*x^5 - 1/10*x^10). %Y A061135 Cf. A000085, A001470, A001472, A052501, A053496 - A053505, A001189, A001471, A001473, A061121 - A061128, A000704, A061129 - A061132, A048099, A051695, A061133 - A061135. %K A061135 easy,nonn %O A061135 1,9 %A A061135 _Vladeta Jovovic_, Apr 14 2001