a(n) = n!*[x^n](exp(n*x)*BesselI_{1}(2*x)/x), n>=0, main diagonal of A247495.

A247496

a(n) = n!*[x^n](exp(n*x)*BesselI_{1}(2*x)/x), n>=0, main diagonal of A247495.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =36a(4) =354a(5) =4425a(6) =67181a(7) =1200745a(8) =24699662a(9) =574795035a(10) =14930563042a(11) =428235433978

External references