Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #19 Sep 08 2022 08:45:38
%S 17,1601,8837,16901,33857,65537,160001,190097,240101,295937,401957,
%T 577601,1136357,1336337,1378277,1464101,1552517,1833317,2464901,
%U 2755601,3519377,3587237,3865157,4227137,4301477,5410277,5664401,6100901
%N Primes of the form 81n^2 - 90n + 26.
%H Vincenzo Librandi, <a href="/A144571/b144571.txt">Table of n, a(n) for n = 1..2000</a>
%t lst={};Do[If[PrimeQ[p=81*n^2-90*n+26],AppendTo[lst,p]],{n,7!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jan 11 2009 *)
%t Select[Table[81 n^2 - 90 n + 26, {n, 300}], PrimeQ] (* _Vincenzo Librandi_, Jan 02 2014 *)
%o (Magma) [a: n in [0..300] | IsPrime(a) where a is 81*n^2-90*n+26 ]; // _Vincenzo Librandi_, Jan 02 2014
%Y Cf. A154295.
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Jan 06 2009
%E a(1) corrected by _Jon E. Schoenfield_, Jun 17 2010