

A344424


Numbers k such that A344423(k) is prime.


1




OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

A344423(3) = 100111001 is prime, so 3 is a term of the sequence.


PROG

(PARI) is(n) = ispseudoprime(10^(2*n+2) + 111*10^n + 1)


CROSSREFS



KEYWORD

nonn,hard,more


AUTHOR



EXTENSIONS



STATUS

approved



