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A221232 Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2 1

%I #4 Jan 05 2013 08:24:37

%S 4,852,54075,3618339,245539157,16783348483,1149649557942,

%T 78781028973610,5398115263510454,369826510764450212,

%U 25333832048380716784,1735268265292767301022,118852327360929428638771

%N Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2

%C Column 4 of A221234

%H R. H. Hardin, <a href="/A221232/b221232.txt">Table of n, a(n) for n = 1..46</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 05 2013

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Last modified February 28 01:06 EST 2024. Contains 370379 sequences. (Running on oeis4.)