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 A003289 M1229 #35 Jan 16 2019 12:09:12 %S A003289 1,2,4,10,30,98,328,1140,4040,14542,53060,195624,727790,2728450, %T A003289 10296720,39084190,149115456,571504686,2199310460,8494701152, %U A003289 32919635606,127961125094,498775164568,1949112527750,7634623480172 %N A003289 Number of n-step self-avoiding walks on hexagonal lattice from (0,0) to (0,1). %C A003289 The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice. %D A003289 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A003289 D. S. McKenzie, <a href="http://dx.doi.org/10.1088/0305-4470/6/3/009">The end-to-end length distribution of self-avoiding walks</a>, J. Phys. A 6 (1973), 338-352. %H A003289 G. Nebe and N. J. A. Sloane, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/A2.html">Home page for hexagonal (or triangular) lattice A2</a> %Y A003289 Equals A001335(n+1) / 6 for n > 1. %Y A003289 Cf. A003290, A003291, A005549, A005550, A005551, A005552, A005553. %K A003289 nonn,walk,more %O A003289 1,2 %A A003289 _N. J. A. Sloane_ %E A003289 More terms and title improved by _Sean A. Irvine_, Feb 13 2016 %E A003289 a(23)-a(24) from _Bert Dobbelaere_, Jan 03 2019 %E A003289 a(25) from _Bert Dobbelaere_, Jan 15 2019