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A131231
3*A130296 - 2*A128174.
1
1, 6, 1, 7, 3, 1, 12, 1, 3, 1, 13, 3, 1, 3, 1, 18, 1, 3, 1, 3, 1, 19, 3, 1, 3, 1, 3, 1, 24, 1, 3, 1, 3, 1, 3, 1, 25, 3, 1, 3, 1, 3, 1, 3, 1
OFFSET
1,2
COMMENTS
Left column = A047225, numbers congruent to {0,1} mod 6: (1, 6, 7, 12, 13, 18, 19, ...).
Row sums = A131229, numbers congruent to {1,7} mod 10: (1, 7, 11, 17, ...).
FORMULA
3*A130296 - 2*A128174 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
6, 1;
7, 3, 1;
12, 1, 3, 1;
13, 3, 1, 3, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jun 20 2007
STATUS
approved