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A217942 A217941(n)/2. 1
1, 3, 7, 16, 33, 70, 141, 287, 578, 1163, 2327, 4674, 9349, 18718, 37452, 74948, 149897, 299890, 599781, 1199724, 2399498, 4799278, 9598557, 19197792, 38395600, 76792313, 153584811, 307171904, 614343809, 1228692446, 2457384893, 4914778758, 9829558241, 19659134194, 39318268464 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..35.

CROSSREFS

A217941 is the main entry.

Sequence in context: A229914 A192968 A277968 * A002936 A014668 A354909

Adjacent sequences:  A217939 A217940 A217941 * A217943 A217944 A217945

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 23 2012

STATUS

approved

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Last modified October 5 03:25 EDT 2022. Contains 357240 sequences. (Running on oeis4.)