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 A108163 #7 Sep 28 2024 15:54:42
%S A108163 0,1,3,27,41,19,29,81,23,21,63,77,523,127,77,481,371,107,113,451,121,
%T A108163 173,441,501,247,407,319,351,113,1977,707,767,677,1591,1579,3427,439,
%U A108163 43,1291,481,129,3923,2757,1779,961,2379,2731,2831
%N A108163 A124049(n)/3.
%t A108163 lnc[n_]:=Module[{c=0,t=10^n/2},While[!AllTrue[t+{c,-c},PrimeQ],c++];c]; Array[lnc,50]/3 (* _Harvey P. Dale_, Sep 28 2024 *)
%K A108163 nonn
%O A108163 1,3
%A A108163 _Hans Havermann_, Apr 26 2007