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 A253059 #9 May 12 2019 14:09:18 %S A253059 0,1,2,2,2,4,7,8,13,10,62,15,140,92,300,180,704,1880,2053,4381 %N A253059 Number of n-bit words missing from the first 2^n+n-1 bits of the Ehrenfeucht-Mycielski sequence (A007061 or A038219). %H A253059 K. Sutner, <a href="http://www.cs.cmu.edu/~sutner/papers/em-sequence.ps.gz">The Ehrenfeucht-Mycielski sequence</a>, 2001 %H A253059 K. Sutner, <a href="/A007061/a007061_2.pdf">The Ehrenfeucht-Mycielski sequence</a>, 2001 [Cached copy] %Y A253059 Cf. A007061, A038219. %K A253059 nonn,more %O A253059 1,3 %A A253059 _N. J. A. Sloane_, Jan 18 2015