34636834
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=31A000013
- 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=31A000016
- Bisection of A000016 (also of A000013).at n=15A026119
- a(n) = Sum_{ d divides n } phi(d)*2^(n/d)/(2n).at n=28A053634
- a(n) = ceiling(2^(n-1)/n).at n=30A053637
- Number of cyclic graphs with oriented edges on n nodes (up to symmetry of dihedral group).at n=30A053656
- Total number of distinct cycles in a particular cellular automata of size n.at n=28A083843
- Number of cycles for vectors of length n under the Ducci map.at n=30A135547
- Number of solutions to 1 +- 2 +- 3 +- ... +- n == 0 (mod n).at n=30A300190
- Number of solutions to 1 +- 3 +- 5 +- ... +- (2*n-1) == 0 mod n.at n=30A300218
- Number of solutions to 1 +- 4 +- 9 +- ... +- n^2 == 0 (mod n).at n=30A300268
- Number of solutions to 1 +- 8 +- 27 +- ... +- n^3 == 0 (mod n).at n=30A300269