A152863 Numbers for which A000695(p_n) are primes, where p_n is the n-th prime.

2, 3, 7, 9, 10, 14, 15, 16, 18, 23, 28, 34, 35, 36, 40, 41, 42, 43, 50, 51, 52, 55, 56, 57, 59, 63, 71, 75, 76, 77, 80, 85, 86, 87, 92, 96, 103, 104, 115, 118, 119, 121, 122, 132, 138, 143, 150, 151, 158, 163, 166, 175, 176, 180, 181, 196, 202, 204, 205, 206, 208

Offset: 1

Author

Vladimir Shevelev, Dec 14 2008

Keywords

• nonn

Crossrefs

Cf. A152078, A077718.

Programs

PARI

a000695(n) = fromdigits(binary(n), 4);
isok(n) = isprime(a000695(prime(n))); \\ Michel Marcus, Dec 18 2018

Extensions

More terms from Michel Marcus, Dec 18 2018