OFFSET
1,3
EXAMPLE
Square array A(n,k) begins:
1, 1, 1, 1, 1, 1, ...
2, 0, 2, 3, 2, 5, ...
3, 0, 4, 21, 4, 1555, ...
4, 0, 20, 903, 6, 9673655, ...
5, 0, 220, 2667, 12, 187159211791705, ...
6, 0, 1220, 7077, 42, 776119592182705, ...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Mar 24 2020
STATUS
approved