OFFSET
0,6
FORMULA
A(0,k) = 1 and A(n,k) = -(n-1)! * Sum_{j=1..n} j*sigma_k(j)*A(n-j,k)/(n-j)! for n > 0.
EXAMPLE
Square array A(n,k) begins:
1, 1, 1, 1, 1, ...
-1, -1, -1, -1, -1, ...
-3, -5, -9, -17, -33, ...
-1, -7, -31, -115, -391, ...
1, 1, -23, -215, -1319, ...
279, 839, 3399, 17519, 102999, ...
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Seiichi Manyama, Nov 12 2017
STATUS
approved