a(n) = (2*n)! * [x^(2*n)] exp(n*(cosh(x)-1)).

A292966

a(n) = (2*n)! * [x^(2*n)] exp(n*(cosh(x)-1)).

Terms

    a(0) =1a(1) =1a(2) =14a(3) =543a(4) =41332a(5) =5203880a(6) =979067634a(7) =257327195587

External references