O.g.f. A(x) satisfies: [x^n] exp( n*(n-1) * x/A(x) ) = 0 for n > 0.

A337457

O.g.f. A(x) satisfies: [x^n] exp( n*(n-1) * x/A(x) ) = 0 for n > 0.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =7a(4) =93a(5) =1859a(6) =49357a(7) =1629227a(8) =64149805a(9) =2929386667a(10) =152027131261

External references