G.f.: [ Sum_{n>=0} (n+1)*(n+2)/2 * 2^(n^2) * x^n ]^(1/3).
A202942
G.f.: [ Sum_{n>=0} (n+1)*(n+2)/2 * 2^(n^2) * x^n ]^(1/3).
Terms
- a(0) =1a(1) =2a(2) =28a(3) =1592a(4) =320416a(5) =233502272a(6) =640425828736
External references
- oeis: A202942
A202942
G.f.: [ Sum_{n>=0} (n+1)*(n+2)/2 * 2^(n^2) * x^n ]^(1/3).