458788

Appears in sequences

• a(n) = smallest number k such that Product_{i=2..k+1} prime(i)/(prime(i)-1) > n.at n=14A005580
• Triangle, read by rows, T(n, k) = binomial(n, k) for n < 2 and binomial(n, k) + 4^(n-1) * binomial(n-2, k-1) otherwise.at n=47A146988
• Triangle, read by rows, T(n, k) = binomial(n, k) for n < 2 and binomial(n, k) + 4^(n-1) * binomial(n-2, k-1) otherwise.at n=52A146988