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A131227
1
1, 2, 3, 1, 2, 5, 2, 1, 2, 7, 1, 2, 1, 2, 9, 2, 1, 2, 1, 2, 11, 1, 2, 1, 2, 1, 2, 13, 2, 1, 2, 1, 2, 1, 2, 15, 1, 2, 1, 2, 1, 2, 1, 2, 17, 2, 1, 2, 1, 2, 1, 2, 1, 2, 19
OFFSET
0,2
COMMENTS
Row sums = A047383, numbers congruent to {1,5} mod 7: (1, 5, 8, 12, 15, 19, ...)
FORMULA
2*A051340 - A128174 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
2, 3;
1, 2, 5;
2, 1, 2, 7;
1, 2, 1, 2, 9;
2, 1, 2, 1, 2, 11;
1, 2, 1, 2, 1, 2, 13;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jun 20 2007
STATUS
approved