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A045654 Number of 2n-bead balanced binary strings, rotationally equivalent to complement. 3
1, 2, 6, 8, 22, 32, 72, 128, 278, 512, 1056, 2048, 4168, 8192, 16512, 32768, 65814, 131072, 262656, 524288, 1049632, 2097152, 4196352, 8388608, 16781384, 33554432, 67117056, 134217728, 268451968, 536870912, 1073774592, 2147483648 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..31.

R. Stephan, Some divide-and-conquer sequences ...

R. Stephan, Table of generating functions

FORMULA

a(0)=1, a(2n) = a(n)+2^(2n), a(2n+1) = 2^(2n+1). - Ralf Stephan, Jun 07 2003

G.f.: 1/(1-x) + sum(k>=0, t(1+2t-2t^2)/(1-t^2)/(1-2t), t=x^2^k). - Ralf Stephan, Aug 30 2003

For n >= 1, a(n) = sum(0<=k<=A007814(n), 2^(n/2^k)). - David W. Wilson, Jan 01 2012

CROSSREFS

Sequence in context: A111247 A045656 A129342 * A081672 A137072 A153802

Adjacent sequences:  A045651 A045652 A045653 * A045655 A045656 A045657

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified February 17 15:19 EST 2019. Contains 320220 sequences. (Running on oeis4.)