306306

Appears in sequences

• Denominator of Sum_{k=0..n} 1/binomial(n,k).at n=18A046826
• Triangle read by rows: T(n, k) = v(n, k)*((1/v(n, k)) mod prime(k)), where v(n, k) = (Product_{j=1..n} prime(j))/prime(k), n >= 1, 1 <= k <= n.at n=23A240673
• Denominators of b(n) = b(n-1)/2 + 1/(2*n), b(0)=0.at n=17A241519
• Denominators of b(n) = b(n-1)/2 + 1/(2*n), b(0)=0.at n=18A241519
• Numbers n such that denominator(sigma(sigma(n))/n) = denominator(sigma(sigma(s))/s) where s = sigma(n).at n=22A275321