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A134480
1
1, 3, 2, 9, 7, 4, 18, 15, 11, 6, 30, 26, 21, 15, 8, 45, 40, 34, 27, 19, 10, 63, 57, 50, 42, 33, 23, 12, 84, 77, 69, 60, 50, 39, 27, 14, 108, 100, 91, 81, 70, 58, 45, 31, 16, 135, 126, 116, 105, 93, 80, 66, 51, 35, 18
OFFSET
0,2
COMMENTS
Row sums = A134481: (1, 5, 20, 50, 100, 175, ...).
Left border = A134479.
FORMULA
A134478 * A000012 as infinite lower triangular matrices. Triangle read by rows, partial sums of A134478 terms starting from the right.
EXAMPLE
First few rows of the triangle:
1;
3, 2;
9, 7, 4;
18, 15, 11, 6;
30, 26, 21, 15, 8;
45, 40, 34, 27, 19, 10;
63, 57, 50, 42, 33, 23, 12;
...
CROSSREFS
KEYWORD
nonn,tabl,more
AUTHOR
Gary W. Adamson, Oct 27 2007
STATUS
approved