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A154253 Primes of the form 9n^2-8n+2. 1

%I #14 Sep 08 2022 08:45:40

%S 2,3,59,659,1907,2467,3803,9539,19507,23003,24859,30859,37507,42299,

%T 52747,58403,61339,67427,98387,122267,126499,139627,162947,182899,

%U 209459,214987,232003,243707,280547,347707,362003,383987,429899,478403

%N Primes of the form 9n^2-8n+2.

%C Primes in A154254.

%C Primes generated by n = 1, 3, 9, 15, 17, 21, 33, 47, 51, 53, 59,...

%C (All but the first of these are either 3 (mod 6) or 5 (mod 6), as in A047270, because otherwise 9n^2-8n+2 is a multiple of 2 or 3. _R. J. Mathar_, Jul 17 2012).

%H Vincenzo Librandi, <a href="/A154253/b154253.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Table[9n^2-8n+2,{n,0,1500}],PrimeQ] (* _Vincenzo Librandi_, Jul 16 2012 *)

%o (Magma) [a: n in [0..250] | IsPrime(a) where a is 9*n^2-8*n+2]; // _Vincenzo Librandi_, Jul 16 2012

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Jan 05 2009

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Last modified April 26 07:58 EDT 2024. Contains 371991 sequences. (Running on oeis4.)