44741973

Appears in sequences

• Number of rational knots (or two-bridge knots) with n crossings (up to mirroring).at n=27A018240
• Duplicate of A018240.at n=27A090596
• a(n) = - a(n-1) + 5(a(n-2) + a(n-3)) - 2(a(n-4) + a(n-5)) - 8(a(n-6) + a(n-7)).at n=28A090597
• a(n) = 3*a(n-1) - 4*a(n-2) + 6*a(n-3) - 4*a(n-4), with initial terms 0,0,0,1.at n=28A136401
• (A192466)/2.at n=13A192467