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 A125993 #4 Mar 31 2012 13:21:13
%S A125993 2,10,130,138,514,522,642,650,2050,2058,2178,2186,2562,2570,2690,2698,
%T A125993 8194,8202,8322,8330,8706,8714,8834,8842,10242,10250,10370,10378,
%U A125993 10754,10762,10882,10890,32770,32778,32898,32906,33282,33290,33410
%N A125993 A106486-encodings of combinatorial games with value -1.
%C A125993 These are codes for games which belong to the same equivalence class as the game {|0} (i.e. game -1).
%H A125993 A. Karttunen, <a href="/A126000/a126000.scm.txt">Scheme-program for computing this sequence.</a>
%e A125993 Game {|0} is encoded as 2^(1+2*0) = 2, thus 2 is the first term of this sequence. Also 10 belongs belongs into this sequence, as it encodes game {|0,1}, where, as the option 0 dominates the option 1, the latter can be deleted, resulting the same game {|0}. Likewise code 8589934592 (= 2^(1+(2*2^(2*2)))) belongs into this sequence, as it encodes the game {|{-1|}}, which is reversible to game -1.
%Y A125993 Row 3 of A126000.
%K A125993 nonn
%O A125993 1,1
%A A125993 _Antti Karttunen_, Dec 18 2006