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A131911
1
1, 4, 3, 5, 2, 5, 8, 1, 2, 7, 9, 2, 1, 2, 9, 12, 1, 2, 1, 2, 11, 13, 2, 1, 2, 1, 2, 13, 16, 1, 2, 1, 2, 1, 2, 15, 17, 2, 1, 2, 1, 2, 1, 2, 17, 20, 1, 2, 1, 2, 1, 2, 1, 2, 19
OFFSET
1,2
COMMENTS
Left column, congruent to {0, 1} mod 4, A042948: (1, 4, 5, 8, 9, 12, 13, 16, ...).
Row sums = A131912: (1, 7, 12, 18, 23, 29, 34, ...).
FORMULA
2*A131821 - A128174 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
4, 3;
5, 2, 5;
8, 1, 2, 7;
9, 2, 1, 2, 9;
12, 1, 2, 1, 2, 11;
13, 2, 1, 2, 1, 2, 13;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 27 2007
STATUS
approved