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A128141
A122432 (unsigned) * A128132.
1
1, 2, 2, 3, 5, 3, 4, 9, 8, 4, 5, 14, 15, 11, 5, 6, 20, 24, 21, 14, 6, 7, 27, 35, 34, 27, 17, 7, 8, 35, 48, 50, 44, 33, 20, 8, 9, 44, 63, 69, 65, 54, 39, 23, 9, 10, 54, 80, 91, 90, 80, 64, 45, 26, 10
OFFSET
1,2
COMMENTS
Row sums = A006522 starting (1, 4, 11, 25, 50, 91, ...). A128142 = A128132 * A122432.
FORMULA
Unsigned A122432 * A128132 as infinite lower triangular matrices; where unsigned A122432 = (1; 3, 1; 6, 3, 1; ...).
EXAMPLE
First few rows of the triangle:
1;
2, 2;
3, 5, 3;
4, 9, 8, 4;
5, 14, 15, 11, 5;
6, 20, 24, 21, 14, 6;
7, 27, 35, 34, 27, 17, 7;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Feb 16 2007
STATUS
approved