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 A191282 #7 Nov 17 2016 03:37:39
%S A191282 1,2,3,4,6,7,8,12,13,14,16,21,24,26,28,32,42,43,48,52,56,57,64,73,84,
%T A191282 86,96,104,112,114,128,146,157,168,172,183,192,208,211,224,228,256,
%U A191282 273,292,314,336,344,366,384,416,422,448,456,463,512,546,584,601,628,672,688,703,732,768,813,832,844,896,912,926,1024,1057,1092
%N A191282 Increasing sequence generated by these rules: a(1)=1, and if x is in a then 2x and x^2+x+1 are in a.
%C A191282 See A191203.
%H A191282 Ivan Neretin, <a href="/A191282/b191282.txt">Table of n, a(n) for n = 1..10000</a>
%e A191282 1 -> 2,3 -> 4,6,7,13 ->
%t A191282 g = 11; Union[Flatten[NestList[{2 #, #^2 + # + 1} &, 1, g]]]
%t A191282 (* A191282; use g>10 to get all of first 60 terms *)
%Y A191282 Cf. A191203.
%K A191282 nonn
%O A191282 1,2
%A A191282 _Clark Kimberling_, May 29 2011