A220973 - OEIS

%I #4 Dec 27 2012 12:46:45

%S 8,23,368,1972,12033,79554,503607,3213597,20509600,131200351,

%T 838727086,5361102811,34276632448,219139964718,1400992769305,

%U 8956840667851,57262934303862,366093267032756,2340506776827743,14963323072215607

%N Equals one maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly one of their king-move neighbors in a random 0..1 nX4 array

%C Column 4 of A220977

%H R. H. Hardin, <a href="/A220973/b220973.txt">Table of n, a(n) for n = 1..23</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 27 2012