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 A334330 #16 Jul 06 2020 02:51:25 %S A334330 1,6,18,60,210,726,2448,8448,28818,98556,336618,1150320,3928944, %T A334330 13419204,45828192,156512220,534463698,1825120584,6232259412, %U A334330 21281168202,72666555570,248124503652,847224827676,2892836367066,9877456541376,33725891989626 %N A334330 Number of endless self-avoiding walks of length 2*n for the honeycomb lattice. %H A334330 Nathan Clisby, <a href="https://arxiv.org/abs/1302.2796">Endless self-avoiding walks</a>, arXiv:1302.2796 [cond-mat.stat-mech], 2013. See Table 4 p. 23. %Y A334330 A001668 counts all self-avoiding walks on the honeycomb lattice, without the "endless" restriction. %Y A334330 Cf. A334322 (square lattice), A334326 (simple cubic lattice), A334331 (triangular lattice), A334332 (union jack lattice), A334333 (body centered cubic lattice), A334334 (face centered cubic lattice). %K A334330 nonn,walk %O A334330 0,2 %A A334330 _Michel Marcus_, Apr 23 2020