9587580

Appears in sequences

• Number of n-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple n-stage cycling shift register; also number of binary irreducible polynomials whose degree divides n.at n=28A000031
• Number of nonisomorphic circulant digraphs (i.e., Cayley digraphs for the cyclic group) of order n.at n=28A049297
• Number of step shifted (decimated) sequence structures using a maximum of two different symbols.at n=28A056391
• Bisection of A000031.at n=14A100446
• Number of necklaces with n beads of 3 colors, no 2 adjacent beads the same color.at n=27A106365
• Number of distinct n X 4 toroidal binary arrays.at n=6A184266
• Number of distinct n X 7 toroidal binary arrays.at n=3A184269
• Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal binary arrays (n >= 1, k >= 1).at n=48A184271