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 A075927 #5 Apr 14 2019 08:58:23 %S A075927 7,25,42,75,385,642,1155,2184,4233,8330,16523,98305,163842,294915, %T A075927 557064,1081353,2129930,4227083,8421504,16810113,33587330,67141763, %U A075927 134250632,268468361,536903818,1073774731,6442450945,10737418242 %N A075927 Basis for code in A075926. %H A075927 J. H. Conway and N. J. A. Sloane, <a href="https://doi.org/10.1109/TIT.1986.1057187">Lexicographic codes: error-correcting codes from game theory</a>, IEEE Transactions on Information Theory, 32:337-348, 1986. %H A075927 R. W. Hamming, <a href="https://signallake.com/innovation/hamming.pdf">Error Detecting and Error Correcting Codes</a>, Bell System Tech. J., Vol. 29, April, 1950, pp. 147-160. %H A075927 Ari Trachtenberg, <a href="http://ipsit.bu.edu/phdthesis_html/phdthesis_html.html">Error-Correcting Codes on Graphs: Lexicodes, Trellises and Factor Graphs</a> %F A075927 a(n) = b(2^n), where b is the Hamming code d=3. %F A075927 b(n) = XOR(a(i)) where i is a bit set in n. %Y A075927 Cf. A075928, A075929, A075930, A075926, A057716, A075933. %K A075927 nonn,easy %O A075927 0,1 %A A075927 Bob Jenkins (bob_jenkins(AT)burtleburtle.net)