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A128151
0
1, 3, 2, 3, 5, 3, 3, 5, 7, 4, 3, 5, 7, 9, 5, 3, 5, 7, 9, 11, 6, 3, 5, 7, 9, 11, 13, 7, 3, 5, 7, 9, 11, 13, 15, 8, 3, 5, 7, 9, 11, 13, 15, 17, 9, 3, 5, 7, 9, 11, 13, 15, 17, 19, 10
OFFSET
1,2
COMMENTS
Row sums = A028387: (1, 5, 11, 19, 29, 41, ...).
FORMULA
A002260 * A097806 as infinite lower triangular matrices. a(1) = 1; n-th row has (n-1) terms in the sequence (3, 5, 7, 9, ...) followed by "n".
EXAMPLE
First few rows of the triangle:
1;
3, 2;
3, 5, 3;
3, 5, 7, 4;
3, 5, 7, 9, 5;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Feb 16 2007
STATUS
approved