The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A113141 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A113141

Inverse of a Delannoy related triangle.
(history; published version)

#2 by Russ Cox at Fri Mar 30 18:59:12 EDT 2012

AUTHOR

_Paul Barry (pbarry(AT)wit.ie), _, Oct 15 2005

Discussion

Fri Mar 30

18:59

OEIS Server: https://oeis.org/edit/global/287

#1 by N. J. A. Sloane at Tue Jan 24 03:00:00 EST 2006

NAME

Inverse of a Delannoy related triangle.

DATA

1, -3, 1, 2, -5, 1, -2, 10, -7, 1, 2, -14, 22, -9, 1, -2, 18, -46, 38, -11, 1, 2, -22, 78, -106, 58, -13, 1, -2, 26, -118, 230, -202, 82, -15, 1, 2, -30, 166, -426, 538, -342, 110, -17, 1, -2, 34, -222, 710, -1194, 1082, -534, 142, -19, 1, 2, -38, 286, -1098, 2330, -2814, 1958, -786, 178, -21, 1

OFFSET

0,2

COMMENTS

First column is (-1)^n*A104435(n). Row sums are 1,-2,-2,2,2,-2,-2,... Second column is A113142. Inverse of A113139.

EXAMPLE

Triangle begins

1;

-3, 1;

2, -5, 1;

-2, 10, -7, 1;

2, -14, 22, -9, 1;

-2, 18, -46, 38, -11, 1;

KEYWORD

sign,tabl

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Oct 15 2005

STATUS

approved