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A171249
Numbers k such that 10^k*(2+3*10^k)+3 is prime.
0
2, 3, 4, 6, 7, 25, 38, 152, 312, 824, 1195, 1211, 1335, 2228, 3435, 3787, 10317, 11140, 11239
OFFSET
1,1
COMMENTS
No more terms up to k = 3800.
PROG
(PARI) is(n)=ispseudoprime(10^n*(2+3*10^n)+3) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A130776 A077292 A270475 * A036413 A069912 A351329
KEYWORD
more,nonn
AUTHOR
Jason Earls, Dec 06 2009
EXTENSIONS
a(17)-a(19) from Michael S. Branicky, Jun 22 2023
STATUS
approved