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 A054536 #8 Jun 17 2015 04:06:20 %S A054536 1,1,1,2,2,4,2,4,4,6,8,12,18 %N A054536 Maximal size of binary code of length n and asymmetric distance 4. %H A054536 T. Etzion, <a href="http://dx.doi.org/10.1109/18.104336">New lower bounds for asymmetric and unidirectional codes</a>, IEEE Trans. Inform. Theory, 37 (1991), 1696-1705. %H A054536 J. H. Weber, <a href="http://repository.tudelft.nl/view/ir/uuid:d26eccf3-bf97-4340-bb1d-c099c91d456d">Bounds and Constructions for Binary Block Codes Correcting Asymmetric or Unidirectional Errors</a>, Ph. D. Thesis, Tech. Univ. Delft, 1989. %H A054536 J. H. Weber, C. de Vroedt and D. E. Boekee, <a href="http://dx.doi.org/10.1109/18.21262">Bounds and constructions for binary codes of length less than 24 and asymmetric distance less than 6</a>, IEEE Trans. Inform. Theory, 34 (1988), 1321-1332. %Y A054536 Cf. A010101, A010238, A010336. %K A054536 nonn,nice,hard %O A054536 1,4 %A A054536 _N. J. A. Sloane_, Apr 10 2000