OFFSET
1,2
FORMULA
From Hartmut F. W. Hoft, Aug 06 2020: (Start)
a(n) = A067755(n+2)/60, n>=1.
a(n) = (A263951(n+2) - 1)/120, n>=1. (End)
MATHEMATICA
a068485[n_] := (Select[Map[Prime[#]^2&, Range[4, n]], PrimeQ[(#+1)/2]&]-1)/120
a068485[250] (* data - Hartmut F. W. Hoft, Aug 06 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Mar 11 2002
EXTENSIONS
More terms from Sascha Kurz, Mar 26 2002
a(34)-a(45) from Ray Chandler, Apr 12 2010
STATUS
approved