22372352

Appears in sequences

• Number of rational knots (or two-bridge knots) with n crossings (up to mirroring).at n=26A018240
• Duplicate of A018240.at n=26A090596
• Coefficient of x in the reduction by x^2 -> x+2 of the polynomial p(n,x) defined below in Comments.at n=13A192382
• Coefficient of x in the reduction by x^2->x+2 of the polynomial p(n,x)=1+x^n+x^(2n).at n=12A192466
• Number of oriented rational links with crossing number n.at n=25A329908