1398784

Appears in sequences

• Number of rational knots (or two-bridge knots) with n crossings (up to mirroring).at n=22A018240
• Binomial transform, alternating in sign, of Lucas generalized numbers S(n): S(n) = S(n-1) + S(n-2) + S(n-3), S(0)=3, S(1)=1, S(2)=3.at n=31A073314
• Duplicate of A018240.at n=22A090596
• Coefficient of x in the reduction by x^2 -> x+2 of the polynomial p(n,x) defined below in Comments.at n=11A192382
• Coefficient of x in the reduction by x^2->x+2 of the polynomial p(n,x)=1+x^n+x^(2n).at n=10A192466
• Q-residue of the coefficient triangle (A076699) of the cyclotomic polynomials, where Q is the triangular array (t(i,j)) given by t(i,j)=1. (See Comments.)at n=22A193650
• a(n) = 2^(n-4)*(4*n^2 - 16*n + 23).at n=11A217529
• Number of length 6 1..(n+1) arrays with every leading partial sum divisible by 2 or 3.at n=14A257068
• Number of oriented rational links with crossing number n.at n=21A329908