190746

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=22A000031
• Number of nonisomorphic circulant digraphs (i.e., Cayley digraphs for the cyclic group) of order n.at n=22A049297
• Number of step shifted (decimated) sequence structures using a maximum of two different symbols.at n=22A056391
• Continued fraction expansion of a constant x such that the n-th partial quotient equals a(n) = floor(2^n*x), with a(0)=1.at n=17A093053
• Bisection of A000031.at n=11A100446
• Number of necklaces with n beads of 3 colors, no 2 adjacent beads the same color.at n=21A106365
• Number of distinct n X 2 toroidal binary arrays.at n=10A184264
• Triangular array, read by rows: T(n,k) = [(w*x*y*z)^k] (-1 + (1 + w + 1/w)*(1 + x + 1/x)*(1 + y + 1/y)*(1 + z + 1/z))^n for -n <= k <= n.at n=38A329820
• Triangular array, read by rows: T(n,k) = [(w*x*y*z)^k] (-1 + (1 + w + 1/w)*(1 + x + 1/x)*(1 + y + 1/y)*(1 + z + 1/z))^n for -n <= k <= n.at n=46A329820