OFFSET
1,2
COMMENTS
Next term >= 10^4. - Jeppe Stig Nielsen, Mar 28 2014
LINKS
Jacques Basaldua, All Fermat and Mersenne numbers are squarefree.. [link broken]
FORMULA
A006599(n) = a(n) - 1.
MATHEMATICA
Do[ If[ PrimeQ[2^(2n - 1) + 2^n + 1], Print[n]], {n, 5500}] (* Robert G. Wilson v, Jun 03 2005 *)
PROG
(PARI) is(n)=ispseudoprime(2^(2*n-1)+2^n+1) \\ Charles R Greathouse IV, Jun 12 2017
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Alexandre Wajnberg, Jun 02 2005
EXTENSIONS
a(1) and a(12) from Robert G. Wilson v, Jun 03 2005
a(13) = 7350 from Jeppe Stig Nielsen, Mar 28 2014
STATUS
approved