A342184 Primes q such that 10*q-3 and 10*q+1 are cousin primes.

7, 13, 31, 97, 109, 157, 271, 523, 601, 691, 769, 829, 1063, 1069, 1201, 1249, 1291, 1483, 1489, 1567, 1579, 1609, 1693, 1747, 1831, 2203, 2281, 2383, 2803, 2887, 2953, 3511, 3967, 4513, 4651, 5023, 5059, 5437, 5653, 5779, 5821, 6151, 6163, 6199, 6361, 6367

Offset

1,1

Comments

A pair of cousin primes are primes of the form p and p+4 (where p+2 may or may not be a prime).

Generates cousin primes such that the last digits of the primes are 7 and 1 in base 10.

Links

Table of n, a(n) for n=1..46.

Prog

(PARI) isok(p) = isprime(p) && isprime(10*p-3) && isprime(10*p+1); \\ Michel Marcus, Mar 05 2021

Crossrefs

Cf. A046132, A342183, A342185.

Sequence in context: A102002 A239679 A195353 * A247178 A053183 A247955

Adjacent sequences: A342181 A342182 A342183 * A342185 A342186 A342187

Keyword

nonn

Author

Tamas Nagy, Mar 04 2021

Status

approved