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A132476
A007318^(-1) * [3*A007318^2 - 2*A000012].
1
1, 3, 1, 3, 8, 1, 3, 7, 13, 1, 3, 14, 12, 18, 1, 3, 13, 38, 18, 23, 1, 3, 20, 35, 80, 25, 28, 1, 3, 19, 75, 75, 145, 33, 33, 1, 3, 26, 70, 210, 140, 238, 42, 38, 1, 3, 25, 124, 196, 490, 238, 364, 52, 43, 1
OFFSET
0,2
COMMENTS
Row sums = A132477: (1, 4, 12, 24, 48, 96, 192, ...).
FORMULA
Inverse binomial transform of [3*A007318 - 2*A000012], as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
3, 1;
3, 8, 1;
3, 7, 13, 1;
3, 14, 12, 18, 1;
3, 13, 38, 18, 23, 1;
3, 20, 35, 80, 25, 28, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Aug 22 2007
STATUS
approved