OFFSET
0,8
LINKS
Seiichi Manyama, Antidiagonals n = 0..139, flattened
FORMULA
A(n,k) = k*n*A(n-1,k) + A(n-2,k) for n>1.
EXAMPLE
Square array begins:
1, 1, 1, 1, 1, 1, ...
0, 1, 2, 3, 4, 5, ...
1, 3, 9, 19, 33, 51, ...
0, 10, 56, 174, 400, 770, ...
1, 43, 457, 2107, 6433, 15451, ...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Jun 02 2018
STATUS
approved