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 A028882 #33 Aug 26 2024 11:43:41 %S A028882 3,6,12,18,24,36,48,54,60,66,90,96,108,132,138,156,162,174,186,192, %T A028882 204,216,222,228,240,246,270,306,318,330,360,366,384,390,408,438,450, %U A028882 468,474,480,492,498,522,570,576,582,606,612,618,624,636,642,660,678,708 %N A028882 Numbers k such that k^2 - 7 is prime. %H A028882 Edward Jiang, <a href="/A028882/b028882.txt">Table of n, a(n) for n = 1..1000</a> %H A028882 P. De Geest, <a href="https://www.worldofnumbers.com/consemor.htm">Palindromic Quasipronics of the form n(n+x)</a> %t A028882 Select[Range[3,800],PrimeQ[#^2-7]&] (* _Harvey P. Dale_, Jul 21 2013 *) %o A028882 (Magma) [n: n in [3..1000] |IsPrime(n^2-7)]; // _Vincenzo Librandi_, Nov 18 2010 %o A028882 (PARI) for(n=3,1000,if(isprime(n^2-7),print1(n,","))) \\ _Edward Jiang_, Aug 06 2014 %K A028882 nonn %O A028882 1,1 %A A028882 _Patrick De Geest_