64541

Appears in sequences

• Numbers n such that n = pi(n)*k + 1 for some k.at n=31A065136
• a(n) is the smallest integer k > 1 such that k > n * pi(k), where pi() denotes the prime counting function.at n=9A086511
• Numbers n such that there exists at least one number j and pi(m) = d_1 d_2 ... d_j*d_(j+1) d_(j+2) ... d_k where d_1 d_2 ...d_k is the decimal expansion of n.at n=27A112012
• a(n) = 11 + floor(Sum_{j-1..n-1} a(j)/4).at n=39A120168