OFFSET
1,1
COMMENTS
Also, the k-th prime is of the form (m^2+1)/2.
LINKS
Jinyuan Wang, Table of n, a(n) for n = 1..1000 (terms 1..500 from Harvey P. Dale)
MATHEMATICA
Select[Range[5000], OddQ[Sqrt[2Prime[#]-1]]&] (* Harvey P. Dale, Jun 25 2018 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Ray Chandler, Jan 03 2004
EXTENSIONS
Offset changed to 1 by Jinyuan Wang, Aug 02 2021
STATUS
approved