This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A288246 #11 Sep 08 2022 08:46:19 %S A288246 1,4,8,10,11,13,20,26,29,34,35,43,46,50,53,56,68,70,71,85,86,94,95,98, %T A288246 125,130,131,139,149,154,160,161,163,169,170,178,184,194,196,199,208, %U A288246 215,229,239,259,266,269,271,280,283,286,290,298,305,313 %N A288246 Numbers k such that 8*k^3 + 81 is prime. %H A288246 Vincenzo Librandi, <a href="/A288246/b288246.txt">Table of n, a(n) for n = 1..4400</a> %e A288246 a(1) = 1 because 8*1 + 81 = 89 is prime. %e A288246 a(2) = 4 because 8*4^3 + 81 = 593 is prime. %t A288246 Select[Range[500], PrimeQ[8 #^3 + 81] &] %o A288246 (Magma) [n: n in [0..500] |IsPrime(8*n^3+81)]; %Y A288246 Cf. A155722: Numbers k such that 2*k + 9 is prime. %Y A288246 Cf. A002971: Numbers k such that 4*k^2 + 25 is prime. %K A288246 nonn,easy %O A288246 1,2 %A A288246 _Vincenzo Librandi_, Jun 07 2017