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A177077 Primes of the form 5*x^2 - 2*y^2, where x and y are successive natural numbers. 1
2, 13, 53, 317, 613, 797, 1237, 1493, 3533, 4877, 12413, 16573, 17477, 20333, 26693, 30197, 32653, 37853, 40597, 44893, 50957, 54133, 59077, 60773, 64237, 71453, 81013, 82997, 87037, 99733, 108677, 115637, 120397, 127717, 145637, 159157 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) is congruent 1 mod 4.

Primes of the form 3*n^2-4*n-2, with n>1. [Vincenzo Librandi, Aug 06 2010]

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

select(isprime, [seq(3*n^2-4*n-2, n=2..1000)]); # Robert Israel, Aug 14 2018

CROSSREFS

Cf. A176470, A176557.

Sequence in context: A034476 A030517 A048502 * A144235 A180041 A042061

Adjacent sequences:  A177074 A177075 A177076 * A177078 A177079 A177080

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto, May 02 2010

STATUS

approved

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Last modified July 4 16:24 EDT 2020. Contains 335448 sequences. (Running on oeis4.)