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A201790 Primes of the form 5n^2 - 9. 1
11, 71, 311, 491, 971, 2411, 3371, 3911, 7211, 12491, 15671, 16811, 19211, 28871, 31991, 38711, 44171, 49991, 56171, 67271, 74411, 76871, 100811, 118571, 134471, 137771, 154871, 165611, 176711, 180491, 188171, 224711, 250871, 255371 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

MATHEMATICA

Select[Table[5n^2-9, {n, 2, 1000}], PrimeQ]

PROG

(MAGMA) [a: n in [2..500] | IsPrime(a) where a is 5*n^2-9];

CROSSREFS

Sequence in context: A139850 A233416 A174822 * A268985 A211386 A049350

Adjacent sequences:  A201787 A201788 A201789 * A201791 A201792 A201793

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 05 2011

STATUS

approved

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Last modified February 22 23:44 EST 2020. Contains 332157 sequences. (Running on oeis4.)