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Search: id:A134466
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| 0, 1, 1, 2, 6, 6, 11, 22, 44, 92, 92, 157, 311, 622, 1239, 2478, 4956, 9912, 19832, 19832, 36217, 72058, 144061, 288122, 576123, 1152239, 2304478, 4608943
(list; graph; listen)
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OFFSET
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1,4
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COMMENT
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Note that a(n) = a(n-1) for n = [1,] 3, 6, 11, 20,... = A006127(2^k + k) (conjectured); this corresponds to the case where the string c (see A134457) satisfies c(n)="0".c(n-1) (pre-pended "0"). The next string c(n+1) is obtained by inserting "0" after the 1st "1", and adding 1 (except for c(4) where both of these operations are equivalent and only one must be performed). - M. F. Hasler, Dec 17 2007
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CROSSREFS
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Adjacent sequences: A134463 A134464 A134465 this_sequence A134467 A134468 A134469
Sequence in context: A078636 A083482 A099027 this_sequence A062562 A106832 A129902
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KEYWORD
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nonn
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AUTHOR
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David W. Wilson (wilson.d(AT)anseri.com), Dec 17 2007
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