OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
FORMULA
Equals the integer part of { odd terms in A160591 = A000720(A040117) } / 2. - M. F. Hasler, May 22 2009
EXAMPLE
25 is in the sequence because the 51st prime is 233 and 233 mod 12 = 5.
MAPLE
a:=proc(n) if ithprime(2*n+1) mod 12 = 5 then n else fi end: seq(a(n), n=0..300);
MATHEMATICA
Select[Range[0, 500], Mod[Prime[2*# + 1], 12] == 5 &] (* G. C. Greubel, Nov 19 2017 *)
PROG
(PARI) for(n=1, 999, prime(2*n+1)%12==5 & print1(n", ")) \\ M. F. Hasler, May 22 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Mar 29 2006
EXTENSIONS
Edited by N. J. A. Sloane, Apr 05 2006
STATUS
approved