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A101625 A bisection of the Stern-Jacobsthal numbers. 1
0, 1, 1, 5, 1, 21, 17, 69, 1, 277, 273, 1349, 257, 5141, 4113, 16453, 1, 65813, 65809, 329029, 65793, 1381397, 1118225, 4538437, 65537, 18088213, 17826065, 88081733, 16777473, 335549461, 268439569, 1073758277, 1, 4295033109, 4295033105 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

FORMULA

a(n)=sum{k=0..n, mod(binomial(2n-k, k-1), 2)2^(k-1)}; a(n)=A101624(2n+1).

CROSSREFS

Cf. A002450.

Sequence in context: A095368 A029757 A146056 * A051929 A167572 A147476

Adjacent sequences:  A101622 A101623 A101624 * A101626 A101627 A101628

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Dec 10 2004

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Last modified February 16 04:18 EST 2012. Contains 205860 sequences.