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A112991 a(n)=ceiling(2^(mod(2^n,n)+1)/3)-ceiling(2^mod(2^n,n)/3). 0
1, 0, 0, 1, 0, 1, 5, 1, 0, 85, 5, 1, 5, 1, 5, 85, 0, 1, 341, 1, 21845, 85, 5, 1, 21845, 43, 5, 22369621, 21845, 1, 5, 1, 0, 85, 5, 87381, 89478485, 1, 5, 85, 21845, 1, 1398101, 1, 21845, 43691, 5, 1, 21845, 357913941, 5592405, 85, 21845, 1, 89478485 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

COMMENTS

A sequence of Jacobsthal numbers.

LINKS

Table of n, a(n) for n=0..54.

CROSSREFS

Cf. A001045.

Sequence in context: A019156 A256042 A292604 * A137373 A220962 A201292

Adjacent sequences:  A112988 A112989 A112990 * A112992 A112993 A112994

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Oct 08 2005

STATUS

approved

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Last modified January 22 16:42 EST 2019. Contains 319364 sequences. (Running on oeis4.)