

A065042


Numbers k such that prime(k) + pi(k) is a prime.


6



1, 3, 8, 13, 15, 16, 20, 39, 45, 53, 62, 65, 71, 72, 80, 82, 90, 91, 92, 95, 113, 115, 117, 118, 119, 121, 143, 145, 147, 153, 156, 164, 166, 177, 181, 186, 189, 190, 195, 196, 202, 203, 224, 254, 255, 265, 268, 273, 294, 296, 319, 322, 323, 328, 329, 338, 343
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


LINKS



MATHEMATICA

Select[ Range[400], PrimeQ[ Prime[ # ] + PrimePi[ # ]] & ]


PROG

(PARI) { n=0; for (m=1, 10^9, if (isprime(prime(m) + primepi(m)), write("b065042.txt", n++, " ", m); if (n==1000, return)) ) } \\ Harry J. Smith, Oct 04 2009


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



