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A101474 Boustrophedon transform of the signed Jacobsthal numbers. +0
2
0, 1, 1, 3, 9, 21, 111, 393, 2309, 12321, 81071, 560033, 4301109, 35526921, 316858231, 3025055673, 30815437909, 333492212321, 3821573586591, 46224758487313, 588552491006709, 7868364598774521, 110201454736846151 (list; graph; listen)
OFFSET

0,4

COMMENT

Boustrophedon transform of (-1)^n*A001045(n). Binomial transform is A101473.

FORMULA

E.g.f.: (sec(x)+tan(x))(exp(x)-exp(-2x))/3.

CROSSREFS

Sequence in context: A146248 A074000 A067645 this_sequence A007647 A098980 A063586

Adjacent sequences: A101471 A101472 A101473 this_sequence A101475 A101476 A101477

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Jan 21 2005

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.


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