cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

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

Original entry on oeis.org

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

Views

Author

Tamas Nagy, Mar 04 2021

Keywords

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.

Crossrefs

Cf. A046132, A342183, A342185.

Programs

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

A342185 Primes q such that 10*q-1 and 10*q+3 are cousin primes.

Original entry on oeis.org

2, 11, 23, 101, 149, 227, 239, 269, 353, 479, 557, 569, 647, 683, 809, 827, 983, 1289, 1607, 1619, 1823, 1901, 1907, 2039, 2213, 2411, 2447, 2843, 2879, 2957, 2963, 3011, 3119, 3257, 3389, 3557, 3671, 3833, 3923, 4001, 4019, 4397, 4943, 5099, 5309, 5441, 5471
Offset: 1

Views

Author

Tamas Nagy, Mar 04 2021

Keywords

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 9 and 3 in base 10.

Crossrefs

Cf. A046132, A342184, A342183.

Programs

  • PARI
    isok(p) = isprime(p) && isprime(10*p-1) && isprime(10*p+3); \\ Michel Marcus, Mar 05 2021
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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