66927861

Appears in sequences

• Denominator of Sum_{k=0..n} 1/binomial(n,k).at n=24A046826
• Denominator of Sum_{k=0..n} 1/C(2*n,2*k).at n=12A100513
• a(n) = denominator of the sum of reciprocals of the terms in n-th row of triangle A077581.at n=9A126578
• Denominators of the expected number of steps to hit the opposite corner by simple random walk on the n-cube.at n=24A387183