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A131894
2
1, 6, 3, 11, 6, 5, 16, 9, 8, 7, 21, 12, 11, 10, 9, 26, 15, 14, 13, 12, 11, 31, 18, 17, 16, 15, 14, 13, 36, 21, 20, 19, 18, 17, 16, 15, 41, 24, 23, 22, 21, 20, 19, 18, 17, 46, 27, 26, 25, 24, 23, 22, 21, 20, 19
OFFSET
0,2
COMMENTS
Left column = A016861, 5n + 1: (1, 6, 11, 16, 21, 26, ...).
Row sums = A131895: (1, 9, 22, 40, 63, ...).
Triangle A131896 = A000012 * A131843.
FORMULA
Triangle read by rows, partial row sums starting from the right, of A131843.
EXAMPLE
First few rows of the triangle:
1;
6, 3;
11, 6, 5;
16, 9, 8, 7;
21, 12, 11, 10, 9;
26, 15, 14, 13, 12, 11;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 24 2007
STATUS
approved