OFFSET
0,4
COMMENTS
The sequence in the first row and successive differences in followup rows defines the array
1, 1, 1, -3, -7, -19, -39, -83, -167, -339,..
0, 0, -4, -4, -12, -20, -44, -84, -172, -340,..
0, -4, 0, -8, -8, -24, -40, -88, -168, -344,..
-4, 4, -8, 0, -16, -16, -48, -80, -176, -336,..
8, -12, 8, -16, 0, -32, -32, -96, -160, -352, ..
The first two subdiagonals show essentially the powers of 2.
LINKS
FORMULA
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Paul Curtz, Feb 10 2010
EXTENSIONS
Edited and extended by R. J. Mathar, Jun 30 2010
STATUS
approved