91917

Appears in sequences

• Number of Twopins positions.at n=28A005689
• Diagonal sums of the triangle A190152.at n=11A190154
• Positions of pandigital 10-digit numbers after the decimal point in the decimal expansion of Pi.at n=34A280183
• p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = (1 - S^2).at n=33A289918
• p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = (1 - S)(1 + S^2).at n=32A291741
• Expansion of (1 + x)/(1 - x^2*(1 + x)^4).at n=16A375316
• Expansion of (1 - x + x^3)/((1 - x + x^3)^2 - 4*x^3).at n=16A376717
• a(n) = Sum_{k=0..floor(n/3)} 2^k * binomial(2*n-4*k,2*k).at n=14A387622