2485534
domain: N
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=27A000013
- 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=27A000016
- Bisection of A000016 (also of A000013).at n=13A026119
- a(n) = Sum_{ d divides n } phi(d)*2^(n/d)/(2n).at n=24A053634
- Number of cyclic graphs with oriented edges on n nodes (up to symmetry of dihedral group).at n=26A053656
- Number of solutions to 1 +- 2 +- 3 +- ... +- n == 0 (mod n).at n=26A300190
- Number of solutions to 1 +- 3 +- 5 +- ... +- (2*n-1) == 0 mod n.at n=26A300218