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

0,8

Comments

First column is A055113. Row sums are A000108.

Links

Table of n, a(n) for n=0..55.

Example

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

Crossrefs

Sequence in context: A020768 A246182 A104544 * A186363 A356777 A254295

Adjacent sequences: A123877 A123878 A123879 * A123881 A123882 A123883

Keyword

nonn,tabl

Author

Paul Barry, Oct 16 2006

Status

approved