OFFSET
1,2
COMMENTS
a(22) > 31410. - Jinyuan Wang, Feb 03 2020
MAPLE
A093988:=n->`if`(isprime(2^n+3*n), n, NULL): seq(A093988(n), n=1..10^3); # Wesley Ivan Hurt, Jan 21 2017
MATHEMATICA
Do[ If[ PrimeQ[2^n + 3n], Print[n]], {n, 1, 5000, 2}]
PROG
(PARI) isok(n) = isprime(2^n + 3*n); \\ Michel Marcus, Jan 21 2017
(PFGW) ABC2 2^$a+3*$a
a: from 1 to 1000 // Jinyuan Wang, Feb 03 2020
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, May 25 2004
EXTENSIONS
a(19)-a(21) from Ryan Propper, Jul 05 2005
a(22)-a(23) from Michael S. Branicky, May 19 2023
a(24)-a(25) from Michael S. Branicky, Jul 24 2024
STATUS
approved