A047132 T(n,n), array T as in A047130.

1, 1, 2, 5, 28, 84, 272, 911, 3885, 14049, 50891, 185464, 735146, 2794719, 10565837, 39940553, 155711860, 601589056, 2317413464, 8920255482, 34742183340, 135196049411, 525683426601, 2043377119966, 7980296279061

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Extensions

Definition corrected by Georg Fischer, Jan 20 2020