A123880 Inverse of number triangle A123878.

1, 0, 1, 1, 0, 1, 1, 3, 0, 1, 5, 3, 5, 0, 1, 11, 18, 5, 7, 0, 1, 41, 39, 35, 7, 9, 0, 1, 120, 157, 75, 56, 9, 11, 0, 1, 421, 459, 325, 119, 81, 11, 13, 0, 1, 1381, 1668, 950, 553, 171, 110, 13, 15, 0, 1, 4840

Offset: 0

Author

Paul Barry, Oct 16 2006

Keywords

• nonn
• tabl

Comments

First column is A055113. Row sums are A000108.

Examples

			Number triangle begins
1,
0, 1,
1, 0, 1,
1, 3, 0, 1,
5, 3, 5, 0, 1,
11, 18, 5, 7, 0, 1,
41, 39, 35, 7, 9, 0, 1,
120, 157, 75, 56, 9, 11, 0, 1