%I #7 Apr 24 2020 07:51:59
%S 4,8,24,64,200,504,1400,3648,9720,25560,67936,178464,472576,1244208,
%T 3286080,8663232,22861600,60291504,159063744,419556560,1106794584,
%U 2919596768,7701735288,20316965760,53595401400,141384847344,372973574160,983911970608,2595592842456,6847273559040
%N Number of irreducible endless self-avoiding walks of length n for the square lattice.
%H 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 2 column i_n p. 22.
%Y Cf. A334322, A334323, A334325.
%K nonn
%O 1,1
%A _Michel Marcus_, Apr 23 2020