A088159 First row and main diagonal of square table that satisfies T(n+1,k+1) = sum(i=0,n, sum(j=0,k, T(n-i,k-j)*T(i,j) )).

1, 1, 4, 25, 202, 1944, 21356, 261213, 3500132, 50800750, 791987356, 13177143096, 232770367228, 4346862352088, 85504298103304, 1766037126815893, 38195654668499866, 862911190841993448, 20318964099125136372

Offset

0,3

Links

Table of n, a(n) for n=0..18.

Example

Table A088158 begins:
1.1..4..25.202.1944.21356...
1.1..2...9..58..470..4492...
1.2..4..14..80..604..5520...
1.3..8..25.124..862..7468...
1.4.14..46.202.1272.10340...
1.5.22..82.342.1944.14664...
1.6.32.138.586.3074.21356...
...

Crossrefs

Cf. A088158, A088160.

Sequence in context: A195260 A254796 A347585 * A301363 A213192 A036242

Adjacent sequences: A088156 A088157 A088158 * A088160 A088161 A088162

Keyword

nonn

Author

Paul D. Hanna, Sep 20 2003

Extensions

More terms from Ray Chandler, Sep 23 2003

Status

approved