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Search: id:A112991
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A112991 a(n)=ceiling(2^(mod(2^n,n)+1)/3)-ceiling(2^mod(2^n,n)/3). +0
1
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; listen)
OFFSET

0,7

COMMENT

A sequence of Jacobsthal numbers.

CROSSREFS

Cf. A001045.

Sequence in context: A019107 A019183 A019156 this_sequence A137373 A086464 A162298

Adjacent sequences: A112988 A112989 A112990 this_sequence A112992 A112993 A112994

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Oct 08 2005

page 1

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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