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A316723
Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of Product_{j=1..k} (1+x^j)/(1-x^j).
4
1, 1, 0, 1, 2, 0, 1, 2, 2, 0, 1, 2, 4, 2, 0, 1, 2, 4, 6, 2, 0, 1, 2, 4, 8, 8, 2, 0, 1, 2, 4, 8, 12, 10, 2, 0, 1, 2, 4, 8, 14, 18, 12, 2, 0, 1, 2, 4, 8, 14, 22, 26, 14, 2, 0, 1, 2, 4, 8, 14, 24, 34, 34, 16, 2, 0, 1, 2, 4, 8, 14, 24, 38, 50, 44, 18, 2, 0, 1, 2, 4, 8, 14, 24, 40, 58, 70, 56, 20, 2, 0
OFFSET
0,5
LINKS
EXAMPLE
Square array begins:
1, 1, 1, 1, 1, 1, 1, ...
0, 2, 2, 2, 2, 2, 2, ...
0, 2, 4, 4, 4, 4, 4, ...
0, 2, 6, 8, 8, 8, 8, ...
0, 2, 8, 12, 14, 14, 14, ...
0, 2, 10, 18, 22, 24, 24, ...
0, 2, 12, 26, 34, 38, 40, ...
CROSSREFS
Diagonal gives A015128.
Sequence in context: A284749 A062169 A113680 * A128187 A266477 A133121
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Jul 11 2018
STATUS
approved