178962432

Appears in sequences

• a(n) = 2^(n-1)*(2^n - (-1)^n)/3.at n=15A003683
• Number of rational knots (or two-bridge knots) with n crossings (up to mirroring).at n=29A018240
• Duplicate of A018240.at n=29A090596
• 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=13A110953
• (A192466)/2.at n=14A192467
• Smallest pentagonal number with n prime factors (counted with multiplicity).at n=17A209049