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A134199
A002260 + A134082 - I as infinite lower triangular matrices; I = Identity matrix.
1
1, 3, 2, 1, 6, 3, 1, 2, 9, 4, 1, 2, 3, 12, 5, 1, 2, 3, 4, 15, 6, 1, 2, 3, 4, 5, 18, 7, 1, 2, 3, 4, 5, 6, 21, 8, 1, 2, 3, 4, 5, 6, 7, 24, 9, 1, 2, 3, 4, 5, 6, 7, 8, 27, 10
OFFSET
0,2
COMMENTS
Row sums = A052905: (1, 5, 10, 16, 23, 31, 40, ...).
EXAMPLE
First few rows of the triangle:
1;
3, 2;
1, 6, 3;
1, 2, 9, 4;
1, 2, 3, 12, 5;
1, 2, 3, 4, 15, 6;
1, 2, 3, 4, 5, 18, 7;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Oct 13 2007
STATUS
approved