A185756 Column 1 of triangle A185755.

2, 15, 154, 1995, 31191, 571221, 11992688, 283976517, 7487521975, 217567092743, 6907888374828, 237951469523807, 8838510559556783, 352160268261051113, 14982705940607112640, 677935029521206050505, 32508195354031791206799

Offset: 1

Author

Paul D. Hanna, Feb 03 2011

Keywords

• nonn

Comments

Column 0 of triangle A185755 equals n^(n-1).

A185755(n,k) equals the coefficient of x^n*y^k in the n-th iteration of x*(1+xy)/(1-x).

Crossrefs

Cf. A185755, A185757, A185758, A185759.