G.f.: Sum_{n>=0} x^n * (d/dx)^(n^2) x^(n^2) * (1+x)^n / (n^2)!, where (d/dx)^k denotes the k-th derivative operator.

A264416

G.f.: Sum_{n>=0} x^n * (d/dx)^(n^2) x^(n^2) * (1+x)^n / (n^2)!, where (d/dx)^k denotes the k-th derivative operator.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =11a(4) =46a(5) =234a(6) =1269a(7) =7609a(8) =48501a(9) =328831a(10) =2347655a(11) =17551462a(12) =136902440a(13) =1109043889a(14) =9308756773a(15) =80704240807a(16) =721319484280

External references