%I #8 May 23 2023 12:14:17
%S 6,10,36,82,256,676,2050,5826,17568,51640,155590,463996,1397766,
%T 4192646,12626836,37955426,114267376,343694728,1034313190,3111132672,
%U 9359196778,28146901826,84646727920,254509346220,765178882006,2300166018706
%N Number of n X 2 0..2 arrays with row sums equal and column sums unequal to adjacent columns.
%C Column 2 of A203491.
%H R. H. Hardin, <a href="/A203485/b203485.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..2..0....2..0....1..0....2..0....0..2....0..2....1..0....2..0....2..0....0..1
%e ..1..1....0..2....0..1....2..0....2..0....1..1....0..1....1..1....1..1....0..1
%e ..0..2....0..2....0..1....2..0....0..2....0..2....1..0....1..1....0..2....1..0
%e ..2..0....0..2....0..1....2..0....0..2....0..2....0..1....0..2....2..0....0..1
%e ..1..1....2..0....0..1....0..2....1..1....0..2....1..0....2..0....2..0....0..1
%Y Cf. A203491.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 02 2012
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