A065046 Numbers k such that prime(k) - pi(k) is a prime.

1, 2, 3, 4, 7, 9, 14, 15, 16, 19, 22, 30, 38, 44, 55, 64, 79, 81, 90, 91, 93, 94, 96, 101, 113, 115, 117, 118, 121, 122, 123, 124, 125, 133, 142, 148, 163, 173, 176, 178, 182, 183, 185, 189, 190, 199, 205, 206, 208, 223, 226, 232, 239, 240, 251, 253, 255, 263

Offset

1,2

Links

Harry J. Smith, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[300], PrimeQ[Prime[ # ] - PrimePi[ # ]] & ].

Prog

(PARI) { n=0; for (m=1, 10^9, if (isprime(prime(m) - primepi(m)), write("b065046.txt", n++, " ", m); if (n==1000, return)) ) } \\ Harry J. Smith, Oct 04 2009

Crossrefs

Cf. A065042.

Sequence in context: A339397 A129373 A139078 * A049709 A108950 A238545

Adjacent sequences: A065043 A065044 A065045 * A065047 A065048 A065049

Keyword

easy,nonn

Author

Robert G. Wilson v, Nov 05 2001

Status

approved