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Search: id:A061902
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| 1, 1, 1, 2, 3, 5, 9, 17, 34, 68, 135, 270, 539, 1078, 2156, 4311, 8621, 17242, 34484, 68967, 137934, 275867
(list; graph; listen)
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OFFSET
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1,4
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COMMENT
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It appears that either a(n+1) = 2 * a(n) or 2 * a(n) - 1, where this alternation takes on the pattern -1, -1, 0, -1, -1, -1, -1, 0, 0, -1, 0, -1, 0, 0, -1, -1, 0, 0, -1, 0, -1, ...
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CROSSREFS
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Cf. A061482.
Sequence in context: A109740 A000051 A094373 this_sequence A166286 A110113 A137155
Adjacent sequences: A061899 A061900 A061901 this_sequence A061903 A061904 A061905
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KEYWORD
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nonn,base
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AUTHOR
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Asher Auel (asher.auel(AT)reed.edu), May 05 2001
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