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A110014 Primes p such that 6p + 7 is a square. 4
3, 7, 19, 47, 59, 103, 139, 227, 307, 367, 467, 503, 619, 839, 887, 1039, 1319, 1567, 1699, 1907, 1979, 2203, 2687, 3407, 4003, 4759, 4987, 5827, 6079, 6599, 7703, 8287, 9203, 9679, 10499, 10667, 11527, 12239, 13159, 14503, 16747, 17387, 19379, 22447 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..44.

FORMULA

a(n) = (A110015(n) - 7)/6.

MATHEMATICA

Select[Prime[Range[3000]], IntegerQ[Sqrt[6#+7]]&] (* Harvey P. Dale, Dec 08 2010 *)

CROSSREFS

Cf. A110015, A110016.

Sequence in context: A280756 A029855 A209397 * A026581 A151535 A181360

Adjacent sequences:  A110011 A110012 A110013 * A110015 A110016 A110017

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Sep 03 2005

EXTENSIONS

Corrected and extended by Ray Chandler, Sep 04 2005

STATUS

approved

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Last modified October 21 23:02 EDT 2018. Contains 316431 sequences. (Running on oeis4.)