16679040

Appears in sequences

• Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to complement, inequivalent to reverse and reversed complement.at n=24A045668
• Number of isomorphism classes of connected (D_4)-fold coverings of a connected graph with circuit rank n.at n=8A160873
• a(n) = ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 9.at n=3A160956