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 A201712 #6 Sep 08 2022 08:46:01
%S A201712 5,29,47,197,239,389,509,719,797,2309,2447,3359,4229,4799,6047,6269,
%T A201712 6959,8447,10079,10949,11549,12479,14447,17669,18047,19997,20399,
%U A201712 22469,24197,28319,31247,33797,34319,38639,45599,51197,51839,55109
%N A201712 Primes of the form 2n^2 - 3.
%H A201712 Vincenzo Librandi, <a href="/A201712/b201712.txt">Table of n, a(n) for n = 1..5000</a>
%t A201712 Select[Table[2n^2-3,{n,1,1000}],PrimeQ]
%o A201712 (Magma) [a: n in [1..300] | IsPrime(a) where a is 2*n^2-3];
%K A201712 nonn,easy
%O A201712 1,1
%A A201712 _Vincenzo Librandi_, Dec 04 2011