46910271domain: NAppears in sequencesExpansion of e.g.f.: sinh(x)/(1+x).at n=11A009628a(n) = (2*n-2)*(2*n-1)*a(n-1)+1.at n=6A051397Expansion of e.g.f. exp(x)/(1-x^2).at n=11A087208Number of increasing odd cycles in all permutations of {1,2,...,n}.at n=11A186763