OFFSET
0,6
FORMULA
G.f. of column k: Product_{j>0} (1 - j^j*x^j)^(j^(k-1)).
EXAMPLE
Square array begins:
1, 1, 1, 1, 1, ...
-1, -1, -1, -1, -1, ...
-2, -4, -8, -16, -32, ...
-7, -23, -73, -227, -697, ...
-57, -229, -927, -3757, -15207, ...
-541, -2761, -13969, -70237, -351361, ...
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Seiichi Manyama, Nov 11 2017
STATUS
approved