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A132119
A002260 + A000027 - A000012 as infinite lower triangular matrices.
1
1, 3, 3, 6, 5, 6, 10, 8, 9, 10, 15, 12, 13, 14, 15, 21, 17, 18, 19, 20, 21, 28, 23, 24, 25, 26, 27, 28, 36, 30, 31, 32, 33, 34, 35, 36, 45, 38, 39, 40, 41, 42, 43, 44, 45, 55, 47, 48, 49, 50, 51, 52, 53, 54, 55
OFFSET
1,2
COMMENTS
Row sums = A132127: (1, 6, 17, 37, 69, 116, ...).
EXAMPLE
First few rows of the triangle:
1;
3, 3;
6, 5, 6;
10, 8, 9, 10;
15, 12, 13, 14, 15;
21, 17, 18, 19, 20, 21;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Aug 10 2007
STATUS
approved