A134466 See A134457.

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

Offset

1,4

Comments

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 first "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

Links

Table of n, a(n) for n=1..28.

Crossrefs

Sequence in context: A323444 A099027 A306925 * A062562 A208570 A106832

Adjacent sequences: A134463 A134464 A134465 * A134467 A134468 A134469

Keyword

nonn

Author

David W. Wilson, Dec 17 2007

Status

approved