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 A134926 #6 Apr 12 2025 11:20:52
%S A134926 11,12,18,19,23,24,26,27,33,34,39,40,41,42,44,45,48,49,56,57,63,64,65,
%T A134926 66,78,79,81,82,83,84,86,87,105,106,111,112,116,117,125,126,128,129,
%U A134926 131,132,138,139,146,147,153,154,158,159,165,166
%N A134926 Nearest-neighbors of odd isolated primes, divided by 2.
%t A134926 ip=Select[Prime[Range[2,67]],NoneTrue[{#-2,#+2},PrimeQ]&];Union[Flatten[Table[n+{1, -1}, {n, ip}]/2]] (* _James C. McMahon_, Apr 12 2025 *)
%Y A134926 Cf. A134924.
%K A134926 easy,nonn
%O A134926 1,1
%A A134926 _Omar E. Pol_, Nov 27 2007