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Number of nX5 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2
1

%I #4 Jan 14 2013 05:20:02

%S 0,38,1450,52320,1829388,63358088,2188482014,75538637214,

%T 2606815065698,89955626884315,3104132404604618,107115039737573319,

%U 3696240367391216656,127546876795624543082,4401284212854919660438,151875943167053941347552

%N Number of nX5 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2

%C Column 5 of A221388

%H R. H. Hardin, <a href="/A221385/b221385.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for n=3

%e ..0..2..0..1..0....0..2..2..1..0....0..2..1..2..1....0..1..2..1..0

%e ..1..1..1..1..1....0..1..2..1..0....0..0..1..2..1....0..2..2..2..1

%e ..1..2..2..2..0....1..2..1..2..0....1..2..1..1..0....0..2..1..1..0

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 14 2013