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A045668 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to complement, inequivalent to reverse and reversed complement. 2
0, 0, 0, 0, 0, 0, 24, 28, 128, 252, 720, 1364, 3360, 6552, 14616, 29040, 61440, 122400, 253008, 504868, 1028160, 2054388, 4149288, 8294444, 16679040, 33349800, 66895920, 133775712, 267976800, 535920696, 1072758840, 2145452092 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

LINKS

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

FORMULA

It seems that a(n) = 4*n*A011948(n). - Ralf Stephan, Aug 30 2003

CROSSREFS

Sequence in context: A107406 A206261 A217441 * A045659 A319901 A058228

Adjacent sequences:  A045665 A045666 A045667 * A045669 A045670 A045671

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified March 20 19:23 EDT 2019. Contains 321349 sequences. (Running on oeis4.)