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 A114134 #8 Oct 09 2013 00:25:29 %S A114134 1,3,10,11,12,21,110,111,112,113,114,115,116,117,118,119,120,121,122, %T A114134 123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139, %U A114134 140,141,142,1111,11111,111111,1111111,11111111,11111112,11111113 %N A114134 Start with a(1) = 1. For n>1, choose a(n) to be the smallest number > a(n-1) consistent with the condition that "the a(n)-th digit is a 1" is true for all n. %C A114134 There can be 1's in other positions too. %C A114134 Sequence A098645 does not allow 1's in other positions, A210415 is a variant which does not impose a(n)>a(n-1). - _M. F. Hasler_, Oct 08 2013 %H A114134 <a href="/index/Se#self-referencing_sequences">Index to the OEIS: Entries related to self-referencing sequences</a>. %e A114134 The first digit of the sequence is a "1", the 3rd digit also, then the 10th, the 11th, etc. %Y A114134 Cf. A098670. See A098645 for another version. %Y A114134 Cf. A210414-A210423. %K A114134 base,easy,nonn %O A114134 1,2 %A A114134 _Eric Angelini_, Oct 27 2004 %E A114134 Entry revised by Eric Angelini and _N. J. A. Sloane_, Feb 03 2006. %E A114134 More terms from _Rick L. Shepherd_, Feb 05 2006