A174372 Numbers k such that 12*k - 5, 12*k - 1, 12*k + 1, and 12*k + 5 are primes.

1, 9, 19, 26, 91, 119, 124, 156, 224, 399, 436, 471, 569, 691, 1141, 1311, 1339, 1349, 1449, 1619, 1729, 1969, 2009, 2616, 2779, 2961, 3001, 3166, 3369, 3649, 3689, 6641, 6834, 7191, 7401, 7544, 7791, 7924, 8426, 8461, 9214, 9291, 9429, 9431, 9744

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Example

1 is a term because 1*12-5=7, 1*12-1=11, 1*12+1=13, and 1*12+5=17 are all prime.

Mathematica

Select[Range[10^4], AllTrue[12# + {-5, -1, 1, 5}, PrimeQ] &] (* Amiram Eldar, Dec 17 2019 *)

Crossrefs

Cf. A124519.

Sequence in context: A106677 A350261 A091592 * A145906 A090065 A098791

Adjacent sequences: A174369 A174370 A174371 * A174373 A174374 A174375

Keyword

nonn,easy

Author

Juri-Stepan Gerasimov, Mar 17 2010

Extensions

Extended by Charles R Greathouse IV, Mar 18 2010

Status

approved