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%I #13 Aug 14 2020 11:44:39
%S 4,14,56,226,958,4052,17508,75634,330804,1448830,6397288,28293338,
%T 125845174,560617586,2507890716,11234741560,50489990570,227190742034,
%U 1024878998006,4628430595232
%N Guttmann-Torrie simple cubic lattice series coefficients c_n^{2}(Pi/2).
%C The number of n-step self-avoiding walks in two connected octants on a cubic lattice where the walk starts at the origin. - _Scott R. Shannon_, Aug 14 2020
%H A. J. Guttmann and G. M. Torrie, <a href="https://doi.org/10.1088/0305-4470/17/18/023">Critical behavior at an edge for the SAW and Ising model</a>, J. Phys. A 17 (1984), 3539-3552.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Jul 06 2015
%E a(16)-a(20) from _Scott R. Shannon_, Aug 14 2020