A201718 - OEIS

A201718

Primes of the form 3*m^2 - 7.

5, 41, 101, 293, 761, 1193, 1721, 2693, 3461, 3881, 4793, 5801, 8741, 12281, 16421, 17321, 26501, 32441, 36293, 40361, 53861, 62201, 67493, 80681, 86693, 90821, 92921, 101561, 108293, 112901, 119993, 127301, 145193, 167081, 178601, 193541

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OFFSET

1,1

COMMENTS

Primes p such that (p+7)/3 or 3*(p+7) is a square. - Vincenzo Librandi, Feb 16 2016

LINKS

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

MATHEMATICA

Select[Table[3 n^2 - 7, {n, 2, 1000}], PrimeQ]

PROG

(Magma) [a: n in [2..300] | IsPrime(a) where a is 3*n^2-7];

CROSSREFS

Cf. A089682, A201715, A201716, A201717, A201781.

Sequence in context: A199692 A031917 A139846 * A142101 A102265 A337393

Adjacent sequences: A201715 A201716 A201717 * A201719 A201720 A201721

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 05 2011

STATUS

approved