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 A153975 #28 Sep 08 2022 08:45:40 %S A153975 4,8,10,14,64,92,112,140,146,172,218,298,304,322,326,340,350,356,416, %T A153975 440,470,508,554,560,580,626,634,652,668,686,694,704,728,736,746,770, %U A153975 806,818,868,892,920,1054,1082,1102,1130,1156,1196,1256,1264,1378,1418 %N A153975 Values of n such that n^2-3 and n^2+3 are both prime. %C A153975 Intersection of A028873 and A049422. - _Zak Seidov_, Oct 12 2014 %H A153975 G. C. Greubel, <a href="/A153975/b153975.txt">Table of n, a(n) for n = 1..1000</a> %e A153975 4^2 - 3 = 13 and 4^2 + 3 = 19 are both primes, so 4 is in the sequence. %t A153975 Select[Range[1500], PrimeQ[#^2 - 3] && PrimeQ[#^2 + 3] &] (* _Vincenzo Librandi_, Oct 12 2014 *) %o A153975 (Magma) [n: n in [1..1400] | IsPrime(n^2-3) and IsPrime(n^2+3)]; // _Vincenzo Librandi_, Oct 12 2014 %o A153975 (PARI) is(n) = isprime(n^2-3) && isprime(n^2+3); \\ _Altug Alkan_, Sep 01 2016 %Y A153975 Cf. A028870, A028873, A038599, A049422, A108701, A153974. %K A153975 nonn,easy %O A153975 1,1 %A A153975 _Vladimir Joseph Stephan Orlovsky_, Jan 03 2009 %E A153975 Incorrect term 0 removed and Mma edited by _Zak Seidov_, Oct 12 2014