OFFSET
1,1
COMMENTS
It is conjectured that this sequence is infinite.
A066436 gives resulting primes p such that (p+1)/2 is square. - Ray Chandler
REFERENCES
D. Shanks, Solved and Unsolved Problems in Number Theory, 2nd. ed., Chelsea, 1978, p. 31.
LINKS
T. D. Noe, Table of n, a(n) for n=1..1000
FORMULA
a(n) = A160697(n+1). - Reinhard Zumkeller, May 24 2009
MATHEMATICA
Select[Range[200], PrimeQ[2#^2-1]&] (* Harvey P. Dale, Jun 14 2011 *)
PROG
(PARI) { n=0; for (m=1, 10^9, if (isprime(2*m^2 - 1), write("b066049.txt", n++, " ", m); if (n==1000, return)) ) } \\ Harry J. Smith, Nov 08 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 09 2002
EXTENSIONS
Extended by Ray Chandler, Sep 15 2005
STATUS
approved