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A131919
0
1, 3, 3, 5, 3, 5, 7, 4, 4, 7, 9, 5, 5, 5, 9, 11, 6, 6, 6, 6, 11, 13, 7, 7, 7, 7, 7, 13, 15, 8, 8, 8, 8, 8, 8, 15, 17, 9, 9, 9, 9, 9, 9, 9, 17, 19, 10, 10, 10, 10, 10, 10, 10, 10, 19
OFFSET
0,2
COMMENTS
Row sums = A028872: (1, 6, 13, 22, 33, 46, ...).
FORMULA
A002024 + A131821 - A000012 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
3, 3;
5, 3, 5;
7, 4, 4, 7;
9, 5, 5, 5, 9;
11, 6, 6, 6, 6, 11;
13, 7, 7, 7, 7, 7, 13;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 28 2007
STATUS
approved