A047136 a(n) = T(n,n+1), array T as in A047130.

1, 2, 5, 14, 56, 188, 639, 2206, 8485, 31278, 114960, 423612, 1621969, 6160764, 23359289, 88603820, 341015446, 1312635338, 5052259362, 19452272144, 75341562629, 292245458188, 1134351244952, 4405229026674, 17153557736343

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Cf. A047130.

Extensions

Definition corrected by Georg Fischer, Jan 20 2020