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%I #4 Nov 05 2016 11:36:43
%S 0,74,2353,84970,2967962,103960169,3638916907,127378891305,
%T 4458779090218,156075459353260,5463275862035992,191236872538989228,
%U 6694068173580106896,234319606216204278149,8202139030768885667342,287108218400489269268262
%N Number of nX4 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.
%C Column 4 of A277945.
%H R. H. Hardin, <a href="/A277941/b277941.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A277941/a277941.txt">Empirical recurrence of order 70</a>
%F Empirical recurrence of order 70 (see link above)
%e Some solutions for n=4
%e ..0..1..0..2. .0..2..1..2. .0..1..0..0. .0..1..2..0. .0..0..1..0
%e ..1..2..1..0. .1..0..1..0. .2..2..1..1. .0..0..2..1. .1..2..2..2
%e ..1..1..2..1. .2..0..1..2. .0..1..0..2. .2..2..1..0. .2..0..2..0
%e ..0..1..1..0. .2..1..1..0. .0..0..0..1. .1..1..0..2. .1..1..2..1
%Y Cf. A277945.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 05 2016