a(n) = (2n+1)*(n+1)!*Bernoulli(2n).

A263445

a(n) = (2n+1)*(n+1)!*Bernoulli(2n).

Terms

    a(0) =1a(1) =1a(2) =-1a(3) =4a(4) =-36a(5) =600a(6) =-16584a(7) =705600a(8) =-43751232a(9) =3790108800a(10) =-443539877760

External references