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A201793 Primes of the form 7n^2 - 1. 1
251, 2267, 6299, 12347, 16127, 20411, 30491, 49391, 81647, 90971, 100799, 121967, 170351, 183707, 197567, 211931, 226799, 242171, 344987, 363887, 383291, 444527, 465947, 510299, 580607, 605051, 681407, 790271, 847727, 907199 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Table[7n^2-1, {n, 1, 1000}], PrimeQ]
PROG
(Magma) [a: n in [1..400] | IsPrime(a) where a is 7*n^2-1];
CROSSREFS
Sequence in context: A099734 A054800 A033451 * A183840 A340636 A234929
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 06 2011
STATUS
approved

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Last modified May 22 15:18 EDT 2024. Contains 372758 sequences. (Running on oeis4.)