Voozh

A089238

Numbers k such that 3*k^2/2 - 1 is a prime.

2, 4, 6, 10, 14, 16, 20, 24, 26, 34, 40, 44, 54, 56, 60, 64, 70, 76, 86, 90, 104, 110, 116, 120, 124, 126, 130, 136, 140, 146, 150, 154, 164, 166, 174, 186, 194, 200, 204, 230, 240, 244, 260, 264, 286, 300, 306, 336, 346, 354, 374, 386, 394, 400, 414, 416, 420

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

All terms must be even numbers. - Harvey P. Dale, Jul 03 2017

REFERENCES

M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988

Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997

LINKS

Table of n, a(n) for n=1..57.

MATHEMATICA

Select[Range[0, 500, 2], PrimeQ[(3#^2)/2-1]&] (* Harvey P. Dale, Jul 03 2017 *)