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A174372
Numbers k such that 12*k - 5, 12*k - 1, 12*k + 1, and 12*k + 5 are primes.
1
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
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
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Extended by Charles R Greathouse IV, Mar 18 2010
STATUS
approved