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 A061067 m-th prime prime(m) is included iff prime(m) + m is also prime. 15
 2, 3, 7, 13, 61, 79, 89, 101, 131, 139, 181, 223, 317, 349, 359, 421, 479, 503, 521, 541, 557, 569, 577, 593, 619, 641, 701, 733, 827, 863, 881, 929, 1021, 1069, 1223, 1231, 1249, 1277, 1361, 1399, 1439, 1487, 1733, 1831, 1889, 1987, 2069, 2137, 2143, 2203 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Harry J. Smith, Table of n, a(n) for n = 0..1000 FORMULA a(n) + A064402(n+1) = A061068(n+1). [corrected by Martin Fuller] EXAMPLE 5th term here is 61 = prime(18) and 61 + 18 = 79. MATHEMATICA Prime[Select[Range[500], PrimeQ[Prime[ # ] + # ] &]] (* Stefan Steinerberger, Jul 21 2006 *) Select[Prime[Range[400]], PrimeQ[#+PrimePi[#]]&] (* Harvey P. Dale, Oct 03 2016 *) PROG (PARI) { n=-1; m=0; forprime (p=2, 109597, if (isprime(p + m++), write("b061067.txt", n++, " ", p)) ) } \\ Harry J. Smith, Jul 17 2009 (Magma) [NthPrime(n): n in [1..250] | IsPrime(NthPrime(n)+ n)]; // Vincenzo Librandi, Jan 19 2015 CROSSREFS Cf. A064402, A061068, A227420. Sequence in context: A361988 A085872 A070858 * A171434 A104366 A104367 Adjacent sequences: A061064 A061065 A061066 * A061068 A061069 A061070 KEYWORD nonn AUTHOR Labos Elemer, May 28 2001 EXTENSIONS Edited by N. J. A. Sloane at the suggestion of Andrew S. Plewe, Aug 23 2007 STATUS approved

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Last modified December 3 09:12 EST 2023. Contains 367539 sequences. (Running on oeis4.)