2863333376

Appears in sequences

• a(n) = 2^(n-1)*(2^n - (-1)^n)/3.at n=17A003683
• Number of rational knots (or two-bridge knots) with n crossings (up to mirroring).at n=33A018240
• Duplicate of A018240.at n=33A090596
• Starting a priori with the fraction 1/1, the denominators of fractions built according to the rule: add top and bottom to get the new bottom, add top and 9 times the bottom to get the new top.at n=15A110953
• (A192466)/2.at n=16A192467
• Expansion of Sum_{n>=0} (-4)^n * (2*4^n + 1)/3 * x^(n*(n+1)/2).at n=36A370018