A171249 Numbers k such that 10^k*(2+3*10^k)+3 is prime.

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.

Links

Table of n, a(n) for n=1..19.

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

Adjacent sequences: A171246 A171247 A171248 * A171250 A171251 A171252

Keyword

more,nonn

Author

Jason Earls, Dec 06 2009

Extensions

a(17)-a(19) from Michael S. Branicky, Jun 22 2023

Status

approved