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A131350
2*A007318 - A049310 as infinite lower triangular matrices.
1
1, 2, 1, 1, 4, 1, 2, 4, 6, 1, 1, 8, 9, 8, 1, 2, 7, 20, 16, 10, 1, 1, 12, 24, 40, 25, 12, 1, 2, 10, 42, 60, 70, 36, 14, 1, 1, 16, 46, 112, 125, 112, 49, 16, 1, 2, 13, 72, 148, 252, 231, 168, 64, 18, 1
OFFSET
0,2
COMMENTS
Row sums = A099036 starting (1, 3, 6, 13, 27, 56, 115,...).
EXAMPLE
First few rows of the triangle are:
1;
2, 1;
1, 4, 1;
2, 4, 6, 1;
1, 8, 9, 8, 1;
2, 7, 20, 16, 10, 1;
1, 12, 24, 40, 25, 12, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 02 2007
STATUS
approved