17895679

Appears in sequences

• Number of n-bead necklaces with beads of 2 colors and primitive period n, when turning over is not allowed but the two colors can be interchanged.at n=30A000048
• Number of monic irreducible polynomials over GF(4) of degree n with fixed nonzero trace.at n=14A054660
• Number of monic irreducible polynomials over GF(4) with zero trace.at n=14A054661
• Number of 4-ary Lyndon words of length n with trace 0 mod 4.at n=14A054664
• Number of primitive (period n) n-bead necklace structures using exactly two different colored beads.at n=29A056303