OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = (A110015(n) - 7)/6.
MATHEMATICA
Select[Prime[Range[3000]], IntegerQ[Sqrt[6#+7]]&] (* Harvey P. Dale, Dec 08 2010 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Sep 03 2005
EXTENSIONS
Corrected and extended by Ray Chandler, Sep 04 2005
STATUS
approved