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 A125995 #4 Mar 31 2012 13:21:13
%S A125995 4,5,20,21,68,69,84,85,4100,4101,4116,4117,4164,4165,4180,4181,16388,
%T A125995 16389,16404,16405,16452,16453,16468,16469,20484,20485,20500,20501,
%U A125995 20548,20549,20564,20565,65540,65541,65556,65557,65604,65605,65620
%N A125995 A106486-encodings of combinatorial games with value 2.
%C A125995 These are codes for games which belong to the same equivalence class as the game {1|} (i.e. the game 2).
%H A125995 A. Karttunen, <a href="/A126000/a126000.scm.txt">Scheme-program for computing this sequence.</a>
%e A125995 Game {1|} is encoded as 2^(2*1) = 4, thus 4 is the first term of this sequence. Also 5 belongs into this sequence, as it encodes game {0,1|}, where, because the option 1 dominates the option 0 on the left side, the zero can be deleted, resulting the same game {1|}.
%Y A125995 Row 5 of A126000.
%K A125995 nonn
%O A125995 1,1
%A A125995 _Antti Karttunen_, Dec 18 2006