490853416

Appears in sequences

• Definition (1): Number of n-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed.at n=35A000013
• a(n) is the number of distinct (infinite) output sequences from binary n-stage shift register which feeds back the complement of the last stage.at n=35A000016
• Number of circulant tournaments on 2n+1 nodes up to Cayley isomorphism.at n=34A002086
• Bisection of A000016 (also of A000013).at n=17A026119
• Number of nonisomorphic circulant tournaments, i.e., Cayley tournaments for cyclic group of order 2n-1.at n=35A049288
• a(n) = Sum_{ d divides n } phi(d)*2^(n/d)/(2n).at n=32A053634
• Number of cyclic graphs with oriented edges on n nodes (up to symmetry of dihedral group).at n=34A053656
• Number of solutions to 1 +- 2 +- 3 +- ... +- n == 0 (mod n).at n=34A300190
• Number of solutions to 1 +- 3 +- 5 +- ... +- (2*n-1) == 0 mod n.at n=34A300218