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 A108054 Integers n such that 10^n+49 is prime. 27
 1, 2, 3, 5, 8, 17, 24, 32, 65, 66, 67, 79, 83, 98, 152, 260, 781, 1225, 1777, 2023, 2411, 3469, 5347, 10646, 11335, 13989, 14792, 16731, 19015, 29471, 39187, 41456, 80883 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10049". LINKS Makoto Kamada, List of near-repdigit-related prime numbers. EXAMPLE n = 8 ==> 10^8+49 = 100000049, which is prime. MATHEMATICA a={}; Do[p=10^n+49; If[PrimeQ[p], AppendTo[a, n]], {n, 0, 10^3, 1}]; a (* Vladimir Joseph Stephan Orlovsky, Jul 17 2008 *) PROG (PARI) for(n=1, 1e4, if(ispseudoprime(10^n+49), print1(n", "))) \\ Charles R Greathouse IV, Jul 25 2011 CROSSREFS Cf. A049054, A088274, A088275, A095688. Sequence in context: A030034 A093000 A122630 * A123612 A077177 A303874 Adjacent sequences:  A108051 A108052 A108053 * A108055 A108056 A108057 KEYWORD more,nonn AUTHOR Julien Peter Benney (jpbenney(AT)ftml.net), Jun 02 2005 EXTENSIONS a(23) from Ray G. Opao, Dec 13 2006 a(24)-a(31) from Robert Price, May 28 2010 Edited by Ray Chandler, Dec 23 2010 a(32) from Robert Price, Dec 27 2010 a(33) from Robert Price, Mar 03 2011 STATUS approved

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Last modified November 15 01:39 EST 2018. Contains 317224 sequences. (Running on oeis4.)