a(n) = [x^(n+1)*y] exp( Sum_{m>=1} (2^m + y)^m * x^m/m ), in which the coefficients of x^n*y^k are integer for n>=k>=0.
A155811
a(n) = [x^(n+1)*y] exp( Sum_{m>=1} (2^m + y)^m * x^m/m ), in which the coefficients of x^n*y^k are integer for n>=k>=0.
Terms
- a(0) =1a(1) =6a(2) =82a(3) =4452a(4) =1074934a(5) =1082704500
External references
- oeis: A155811