A045669 Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to reversed complement, inequivalent to reverse and complement.

0, 0, 0, 12, 32, 120, 288, 784, 1792, 4284, 9600, 21824, 47520, 104832, 225792, 487260, 1040384, 2219520, 4699296, 9942016, 20930400, 43994748, 92184576, 192843776, 402451200, 838655400, 1744404480, 3623423328, 7515275040

Offset

0,4

Links

Andrew Howroyd, Table of n, a(n) for n = 0..200

Formula

a(n) = 2*n*A045687(n).

a(n) = A045664(n) - A045665(n). - Andrew Howroyd, Sep 14 2019

Crossrefs

Cf. A045664, A045665, A045687.

Sequence in context: A102091 A303079 A268769 * A045660 A334307 A192213

Adjacent sequences: A045666 A045667 A045668 * A045670 A045671 A045672

Keyword

nonn

Author

David W. Wilson

Status

approved