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A131252
2
1, 2, 1, 4, 3, 1, 7, 6, 3, 1, 12, 11, 7, 3, 1, 20, 19, 14, 7, 3, 1, 33, 32, 26, 15, 7, 3, 1, 54, 53, 46, 30, 15, 7, 3, 1, 88, 87, 79, 57, 31, 15, 7, 3, 1, 143, 142, 133, 104, 62, 31, 15, 7, 3, 1
OFFSET
0,2
COMMENTS
Left border = A000071, Fibonacci numbers - 1, starting with F(3): (1, 2, 4, 7, 12, ...). Row sums = A131253: (1, 3, 8, 17, 34, 64, 117, ...).
FORMULA
A052509 * A000012, where A000012 = (1; 1,1; 1,1,1; ...).
EXAMPLE
First few rows of the triangle:
1;
2, 1;
4, 3, 1;
7, 6, 3, 1;
12, 11, 7, 3, 1;
20, 19, 14, 7, 3, 1;
33, 32, 26, 15, 7, 3, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jun 23 2007
STATUS
approved