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 A243887 #14 Sep 08 2022 08:46:08
%S A243887 3,11,23,59,83,143,179,263,419,479,683,839,923,1103,1403,1739,1859,
%T A243887 2243,2519,2663,3119,3443,3959,4703,5099,5303,5723,5939,6383,8063,
%U A243887 8579,9383,9659,11099,11399,12323,13283,13943,14963,16019,16379,18239,18623,19403,19799
%N A243887 (p^2 - 3)/2 for odd primes p.
%H A243887 Vincenzo Librandi, <a href="/A243887/b243887.txt">Table of n, a(n) for n = 1..1000</a>
%F A243887 a(n) = A216244(n) - 1. [_Robert Israel_, Jun 15 2014]
%t A243887 Table[(Prime[n]^2 - 3)/2, {n, 2, 100}]
%o A243887 (Magma) [(p^2-3)/2: p in PrimesInInterval(3, 300)];
%Y A243887 Cf. A065091, A165635, A216244.
%K A243887 nonn,easy
%O A243887 1,1
%A A243887 _Vincenzo Librandi_, Jun 15 2014