OFFSET
1,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..10000
EXAMPLE
3 is in the sequence because 3 = sqrt(17 - 1) - 1, where 17 is prime.
5 is in the sequence because 5 = sqrt(37 - 1) - 1, where 37 is prime.
MATHEMATICA
Select[Sqrt[#-1]-1&/@Prime[Range[200000]], PrimeQ] (* Harvey P. Dale, May 19 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky, Mar 01 2009
STATUS
approved