A127969 Inverse of number triangle A127967.

1, -1, 1, -1, 0, 1, 1, 0, -2, 1, 2, 0, -3, 0, 1, -3, 0, 5, 0, -3, 1, -8, 0, 13, 0, -6, 0, 1, 17, 0, -28, 0, 14, 0, -4, 1, 56, 0, -92, 0, 45, 0, -10, 0, 1, -155, 0, 255, 0, -126, 0, 30, 0, -5, 1, -608

Offset

0,9

Comments

First column is (-1)^C(n+1,2)*A099960(n), signed interleaved Genocchi numbers of the first and second kind. Row sums are (1,0,0,0,...).

Links

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

Example

Triangle begins
1,
-1, 1,
-1, 0, 1,
1, 0, -2, 1,
2, 0, -3, 0, 1,
-3, 0, 5, 0, -3, 1,
-8, 0, 13, 0, -6, 0, 1,
17, 0, -28, 0, 14, 0, -4, 1,
56, 0, -92, 0, 45, 0, -10, 0, 1,
-155, 0, 255, 0, -126, 0, 30, 0, -5, 1,
-608, 0, 1000, 0, -493, 0, 115, 0, -15, 0, 1,
2073, 0, -3410, 0, 1683, 0, -396, 0, 55, 0, -6, 1,
9440, 0, -15528, 0, 7662, 0, -1799, 0, 245, 0, -21, 0, 1

Crossrefs

Sequence in context: A276695 A358096 A071485 * A081733 A102587 A272608

Adjacent sequences: A127966 A127967 A127968 * A127970 A127971 A127972

Keyword

sign,tabl

Author

Paul Barry, Feb 09 2007

Status

approved