

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
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OFFSET

0,13


COMMENTS

A009545 is principal sequence of degenerate case a(n)=2a(n1)2a(n2), which means second differences opposite to the sequence, for generally a(n)=4a(n1)6a(n2)+4a(n3) 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: A103668 A076472 A161840 * A085341 A221474 A160812
Adjacent sequences: A140299 A140300 A140301 * A140303 A140304 A140305


KEYWORD

sign,uned


AUTHOR

Paul Curtz, May 27 2008


STATUS

approved



