OFFSET
1,1
EXAMPLE
3^2 = (5+7+11+13)/4, 179^2 = (32027+32029+32051+32057)/4.
MATHEMATICA
Select[Sqrt[Mean[#]]&/@Partition[Prime[Range[147*10^5]], 4, 1], PrimeQ] (* Harvey P. Dale, Jul 27 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Oct 03 2012
STATUS
approved