OFFSET
1,1
REFERENCES
H. Dubner, "Palindromic Sophie Germain primes", Journal of Recreational Mathematics, Vol. 26(1):38-41 1994 Baywood Inc. NY
LINKS
Dmitry Petukhov, Table of n, a(n) for n = 1..804 (terms up to 10^15).
H. Dubner, Palindromic Sophie Germain Primes
EXAMPLE
3916193 is in the sequence because both 3916193 and 2*3916193 + 1 = 7832387 are palindromic primes.
MATHEMATICA
Select[Prime@Range@1000000, PalindromeQ@#&&PalindromeQ[2#+1]&&PrimeQ[2#+1]&] (* Giorgos Kalogeropoulos, May 14 2021 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Lekraj Beedassy, Apr 30 2003
STATUS
approved