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A045674 2n-bead balanced binary necklaces, equivalent to reverse, complement and reversed complement. 1
1, 1, 2, 2, 4, 4, 6, 8, 12, 16, 20, 32, 38, 64, 72, 128, 140, 256, 272, 512, 532, 1024, 1056, 2048, 2086, 4096, 4160, 8192, 8264, 16384, 16512, 32768, 32908, 65536, 65792, 131072, 131344, 262144, 262656, 524288, 524820, 1048576, 1049600 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..42.

Index entries for sequences related to necklaces

FORMULA

a(2n) = a(n) + 2^(n-1), a(2n+1) = 2^n. - Ralf Stephan, Nov 01 2003

CROSSREFS

Cf. A045654.

Sequence in context: A240012 A094858 A029940 * A143483 A192326 A131733

Adjacent sequences:  A045671 A045672 A045673 * A045675 A045676 A045677

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified December 22 17:45 EST 2014. Contains 252365 sequences.