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Search: id:A115639
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A115639 First column of divide-and-conquer triangle A115636. +0
3
1, 1, 4, 4, 4, 4, 16, 16, 16, 16, 16, 16, 16, 16, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256 (list; graph; listen)
OFFSET

0,3

FORMULA

G.f.: (1/(1-x))(1/4+(3/4)*sum{k>=1, 4^(k-1)x^(2^k-2)}).

CROSSREFS

Sequence in context: A107680 A134660 A132383 this_sequence A062732 A100777 A024727

Adjacent sequences: A115636 A115637 A115638 this_sequence A115640 A115641 A115642

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Jan 27 2006

page 1

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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