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A201783
Primes of the form 5n^2 - 1.
1
19, 79, 179, 499, 719, 1279, 1619, 1999, 2879, 3919, 5119, 5779, 7219, 8819, 9679, 11519, 15679, 19219, 20479, 24499, 25919, 28879, 33619, 35279, 36979, 40499, 44179, 49999, 56179, 71999, 74419, 79379, 81919, 84499, 87119, 89779
OFFSET
1,1
LINKS
MATHEMATICA
Select[Table[5n^2-1, {n, 0, 1000}], PrimeQ]
PROG
(Magma) [a: n in [0..300] | IsPrime(a) where a is 5*n^2-1];
CROSSREFS
Sequence in context: A139871 A142789 A158491 * A139941 A127270 A053665
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 05 2011
STATUS
approved