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 A070270 Primes for which the smallest positive primitive root is even and nonprime. 1
 41, 109, 151, 229, 251, 271, 313, 337, 367, 733, 761, 971, 991, 1021, 1031, 1069, 1289, 1297, 1303, 1429, 1471, 1489, 1759, 1783, 1789, 1811, 1871, 1873, 1879, 2137, 2411, 2441, 2551, 2749, 2791, 2971, 3001, 3061, 3079, 3109, 3221, 3229, 3251, 3301 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 MATHEMATICA Select[Prime[Range[500]], EvenQ[PrimitiveRoot[#]]&&PrimitiveRoot[#]!=2&] (* Harvey P. Dale, Jul 31 2015 *) PROG (PARI) forprime(n=1, 5000, if((-1)^(lift(znprimroot(n))*(1-isprime(lift(znprimroot(n)))))==1+isprime(lift(znprimroot(n))), print1(n, ", "))) CROSSREFS Cf. A047936, A001918. Sequence in context: A211494 A142054 A279213 * A001125 A116509 A105389 Adjacent sequences:  A070267 A070268 A070269 * A070271 A070272 A070273 KEYWORD easy,nonn AUTHOR Benoit Cloitre, May 09 2002 STATUS approved

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Last modified May 26 04:43 EDT 2022. Contains 354074 sequences. (Running on oeis4.)