186019

Properties

Appears in sequences

• Primes p such that p-1 is squarefree and all prime divisors of p-1 other than 17 are also in the sequence.at n=20A267506
• Numbers k such that 3*10^k + 11 is prime.at n=22A295396
• Primes of the form (p^2 - p*q + q^2)/3, where p and q are consecutive primes.at n=21A342706
• a(n) is the number of positive integers k for which Sum_{i=1..r} p_i = Sum_{i=1..r} e_i = n, where p_1^e_1*...*p_r^e_r is the canonical prime factorization of k.at n=42A390784
• Prime numbersat n=16839