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 A200147 #17 Feb 16 2018 18:04:08 %S A200147 1,2,2,4,2,8,2,16,6,32,2,64,2,144,14,256,2,512,2,1024,6,2048,2,4096, %T A200147 50,8192,6,16384,2,34816,2,66176,6,147456,130,262168,2,524288,38, %U A200147 1048576,2,2127872,2,4194304,134,8388608,2,17825792,4098,33554432,6,67108864 %N A200147 Number of 0..1 arrays x(0..n-1) of n elements with zero n-1st difference. %C A200147 Column 1 of A200154. %H A200147 Eugen J. Ionascu, <a href="https://arxiv.org/abs/1712.01243">Bisecting binomial coefficients (II)</a>, arXiv preprint arXiv:1712.01243, 2017 %H A200147 Eugen J. Ionascu, Thor Martinsen, Pantelimon Stanica, <a href="https://arxiv.org/abs/1610.02063">Bisecting binomial coefficients</a>, arXiv:1610.02063 [math.CO], 2016. See p. 11. %e A200147 All solutions for n=6 %e A200147 ..0....0....0....1....1....0....1....1 %e A200147 ..0....1....0....1....0....1....0....1 %e A200147 ..1....1....0....0....1....0....0....1 %e A200147 ..1....1....0....0....1....0....0....1 %e A200147 ..0....1....0....1....0....1....0....1 %e A200147 ..0....0....0....1....1....0....1....1 %Y A200147 Cf. A200154. %K A200147 nonn %O A200147 1,2 %A A200147 _R. H. Hardin_, Nov 13 2011 %E A200147 a(38)-a(52) added from Ionascu link by _Michel Marcus_, Oct 10 2016