a(n) = A157503(n)/n for n > 0 with a(0) = 1.

A157504

a(n) = A157503(n)/n for n > 0 with a(0) = 1.

Terms

    a(0) =1a(1) =-1a(2) =-2a(3) =-7a(4) =-40a(5) =-301a(6) =-2856a(7) =-32299a(8) =-416816a(9) =-5892345a(10) =-86464000a(11) =-1177909711a(12) =-8944121088a(13) =349846341467

External references