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 A007201 M5146 #16 Nov 20 2017 13:58:37 %S A007201 24,84,264,1128,4728,20304,86496,369732,1573608,6703068,28474704, %T A007201 120922272,512524704,2171836752,9190071984,38866395264,164191075824, %U A007201 693230730864 %N A007201 Number of self-avoiding walks on hexagonal lattice. %C A007201 The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice. %D A007201 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A007201 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> %H A007201 S. Redner, <a href="http://physics.bu.edu/~redner/pubs/pdf/jpa13p3525.pdf">Distribution functions in the interior of polymer chains</a>, J. Phys. A 13 (1980), 3525-3541, doi:10.1088/0305-4470/13/11/023. %Y A007201 Cf. A007200. %K A007201 nonn,walk %O A007201 3,1 %A A007201 _Simon Plouffe_ %E A007201 a(15)-a(20) from _Sean A. Irvine_, Nov 20 2017