1989680

Appears in sequences

• Denominators of partial sums of reciprocals of lcm(1..n) = A003418(n).at n=19A064858
• a(1)=1, a(n) = LCM of the integers, from 1 to n/2, which are coprime to n.at n=38A124443
• a(n) = denominator of the sum of reciprocals of those positive integers which are <= n and are not among the first (n-1) terms of A130502.at n=20A130503
• a(n) = denominator of the sum of reciprocals of those positive integers which are <= n and are not among the first (n-1) terms of A130502.at n=21A130503
• Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=13.at n=10A145634
• Denominator of the Harary number for the cycle graph C_n.at n=38A160047
• Number of distinct 5-card poker hands using n ranks and 4 unlabeled suits.at n=22A181430