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 A255538 #12 Apr 08 2015 04:08:59 %S A255538 1,0,0,0,0,0,2,26,544 %N A255538 Number of connected rigid digital images of n points, up to isomorphism. %C A255538 Rigid means that the identity map is not homotopic to any other map. %H A255538 P. C. Staecker, <a href="http://arxiv.org/abs/1502.06236">Some enumerations of binary digital images</a>, arXiv:1502.06236 [math.CO], 2015 (see table p. 3). %Y A255538 Cf. A248571, A255537. %K A255538 nonn,hard,more %O A255538 1,7 %A A255538 _P. Christopher Staecker_, Feb 24 2015