OFFSET
1,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = (A110481(n) + 6)/5.
MATHEMATICA
Select[Prime[Range[20000]], IntegerQ[Sqrt[5# - 6]] &] (* Harvey P. Dale, Feb 03 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Sep 09 2005
EXTENSIONS
Corrected and extended by Ray Chandler, Sep 12 2005
STATUS
approved