# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a050567 Showing 1-1 of 1 %I A050567 #18 Jan 17 2019 10:08:17 %S A050567 2,4,8,10,14,18,22,24,26,28,36,42,58,64,78,158,198,206,424,550,676, %T A050567 904,1276,1374,1536,1642,2124,2796,5266,5318,8828,11638,22968,35836, %U A050567 53348,55808,79826,105282,112418,129804,144456,216954,624398,654488 %N A050567 Numbers n such that 83*2^n-1 is prime. %C A050567 Also in the sequence: 851092 - Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008 %H A050567 Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300 %H A050567 Wilfrid Keller, List of primes k.2^n - 1 for k < 300 %H A050567 Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime %H A050567 Kosmaj, Riesel list k<300. %o A050567 (PARI) is(n)=ispseudoprime(83*2^n-1) \\ _Charles R Greathouse IV_, Jun 13 2017 %K A050567 hard,nonn %O A050567 1,1 %A A050567 _N. J. A. Sloane_, Dec 29 1999 %E A050567 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE