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A137629
Triangle read by rows, A026794^2.
2
1, 2, 1, 4, 0, 1, 7, 2, 0, 1, 11, 2, 0, 0, 1, 18, 4, 2, 0, 0, 1, 26, 4, 2, 0, 0, 0, 1, 39, 9, 2, 2, 0, 0, 0, 1, 55, 9, 4, 2, 0, 0, 0, 0, 1, 79, 16, 4, 2, 2, 0, 0, 0, 0, 1, 106, 18, 6, 2, 2, 0, 0, 0, 0, 0, 1, 150, 29, 9, 4, 2, 2, 0, 0, 0, 0, 0, 1
OFFSET
1,2
COMMENTS
Row sums = A137630: (1, 3, 5, 10, 14, 25, 33, 53, 71, 104, ...).
Left border = A137631: (1, 2, 4, 7, 11, 18, 26, 39, 55, 79, ...).
FORMULA
Square of the partition triangle.
EXAMPLE
First few rows of the triangle:
1;
2, 1;
4, 0, 1;
7, 2, 0, 1;
11, 2, 0, 0, 1;
18, 4, 2, 0, 0, 1;
26, 4, 2, 0, 0, 0, 1;
39, 9, 2, 2, 0, 0, 0, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jan 31 2008
STATUS
approved