129127

Properties

Appears in sequences

• Primes p such that the NSW number A002315((p-1)/2) is prime.at n=19A005850
• Indices of prime companion Pell numbers, divided by 2 (A001333).at n=23A099088
• Primes which are the reverse concatenation of two consecutive odd numbers.at n=17A104332
• a(n) is the least prime p=prime(m) such that gcd (prime(m) + 2, prime(m + 1) + 2) = 2*n - 1.at n=10A268879
• a(n) is the shyest prime in base n.at n=20A272043
• Primes formed from the concatenation of n and previousprime(n).at n=32A280388
• Number of achiral polyomino rings of length 4n with fourfold rotational symmetry.at n=31A324409
• Number of achiral polyomino rings of length 4n with fourfold rotational symmetry.at n=32A324409
• Prime numbersat n=12089