62217domain: NAppears in sequencesE.g.f. cosh(x)/(1+x).at n=8A009179a(n) = (2*n-2)*(2*n-3)*a(n-1)+1.at n=5A051396Expansion of e.g.f. exp(x)/(1-x^2).at n=8A087208E.g.f.: Sum_{n>=0} (1/n!) * Product_{k=1..n} sinh(k*x).at n=7A194018G.f. A(x) satisfies: 1 - x = Sum_{n>=0} (x^(3*n) + (-1)^n*A(x))^n.at n=20A352819