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A140302 b(n)=A000749(n+1)-2*A000749(n)=0, 0, 1, 2, 2, 0, -4, -8, -8, = 0, A009545 and its three differences by columns on line. 0
0, 0, 1, -1, 0, 1, 0, -1, 1, 1, -1, -1, 2, 0, -2, 0, 2, -2, -2, 2, 0, -4, 0, 4, -4, -4, 4, 4, -8, 0, 8, 0, -8, 8, 8, -8, 0, 16, 0, -16, 16, 16, -16, -16, 32, 0, -32, 0, 32, -32, -32, 32, 0, -64, 0, 64, -64, -64, 64, 64 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,13

COMMENTS

A009545 is principal sequence of degenerate case a(n)=2a(n-1)-2a(n-2), which means second differences opposite to the sequence, for generally a(n)=4a(n-1)-6a(n-2)+4a(n-3) which here holds without restriction.

LINKS

Table of n, a(n) for n=0..59.

FORMULA

Rectangle (vertical sums = 0): 0, 0, 1, 2, 2; 0, 1, 1, 0, -2; 1, 0, -1, -2, -2; -1, -1 -1, 0, 2;

CROSSREFS

Sequence in context: A249441 A076472 A161840 * A085341 A221474 A160812

Adjacent sequences:  A140299 A140300 A140301 * A140303 A140304 A140305

KEYWORD

sign,uned

AUTHOR

Paul Curtz, May 27 2008

STATUS

approved

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Last modified December 11 08:51 EST 2016. Contains 279052 sequences.