99858

Appears in sequences

• Number of degree-n irreducible polynomials over GF(2); number of n-bead necklaces with beads of 2 colors when turning over is not allowed and with primitive period n; number of binary Lyndon words of length n.at n=21A001037
• Product_{k>=1}1/(1 - x^k)^a(k) = 1 + 2x.at n=20A038063
• Product_{k>=1} (1 + x^k)^a(k) = 1 + 2x.at n=20A038067
• a(n) = (1/n) * Sum_{ d divides n } mu(n/d) * (2^d - 1).at n=20A059966
• Number of orbits of length n in map whose periodic points are A000051.at n=20A060477
• Number of orbits of length n in map whose periodic points come from A059990.at n=20A060480
• Number of subsets of {1,2,..n} that sum to 1 mod n.at n=20A064355
• Related to sums of the n-th roots of unity: sums in a circular wedge (excluding the origin).at n=20A107847
• Number of -n..n arrays x(0..4) of 5 elements with zero sum and no two neighbors equal.at n=9A199707
• Number of solutions to +-1 +- 2 +- 3 +- ... +- n == n-1 (mod n).at n=20A300329
• Inverse Weigh transform of 2^n.at n=20A306156
• Inverse Euler transform of (-1)^(n - 1).at n=21A320783
• Table read by antidiagonals where A(n,k) is the number of n X k aperiodic binary toroidal necklaces.at n=38A323861
• Table read by antidiagonals where A(n,k) is the number of n X k aperiodic binary toroidal necklaces.at n=42A323861
• Largest positive integer m with n digits and such that omega(m) = bigomega(m) = n.at n=4A342109
• Inverse Weigh transform of 2^(n-1).at n=20A383034