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A131783
A000012 * (A004736 + A002260 - I).
0
1, 4, 2, 8, 6, 3, 13, 11, 8, 4, 19, 17, 14, 10, 5, 26, 24, 21, 17, 12, 6, 34, 32, 29, 25, 20, 14, 7, 43, 41, 38, 34, 29, 23, 16, 8, 53, 51, 48, 44, 39, 33, 26, 18, 9, 64, 62, 59, 55, 50, 44, 37, 29, 20, 10
OFFSET
1,2
COMMENTS
Left column = A034856: (1, 4, 8, 13, 19, ...).
Row sums = A084990: (1, 6, 17, 36, 65, 106, ...).
FORMULA
A000012 * (A004736 + A002260 - I), I = Identity matrix; A004736 = (1; 2,1; 3,2,1; ...); A002260 = (1; 1,2; 1,2,3; ...).
EXAMPLE
First few rows of the triangle:
1;
4, 2;
8, 6, 3;
13, 11, 8, 4;
19, 17, 14, 10, 5;
26, 24, 21, 17, 12, 6;
34, 32, 29, 25, 20, 14, 7;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 14 2007
STATUS
approved