O.g.f. A(x) satisfies: [x^n] exp( n*(n+1) * A(x) ) = 2*n * [x^(n-1)] exp( n*(n+1) * A(x) ) for n>=1.
A300874
O.g.f. A(x) satisfies: [x^n] exp( n*(n+1) * A(x) ) = 2*n * [x^(n-1)] exp( n*(n+1) * A(x) ) for n>=1.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =78a(4) =1560a(5) =41484a(6) =1361640a(7) =52824144a(8) =2355612192a(9) =118455668960
External references
- oeis: A300874