2581428

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=26A000031
• Bisection of A000031.at n=13A100446
• Number of necklaces with n beads of 3 colors, no 2 adjacent beads the same color.at n=25A106365
• Number of distinct n X 2 toroidal binary arrays.at n=12A184264