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A222447 Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX4 array.

%I A222447 #6 Jul 23 2025 02:36:06
%S A222447 16,210,4056,65536,1048576,16750154,268430848,4294967008,68716055088,
%T A222447 1099511627776,17592186044416,281474975268864,4503599621232000,
%U A222447 72057594037927936,1152921504606846976,18446744065442448416
%N A222447 Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX4 array.
%C A222447 Column 4 of A222448
%H A222447 R. H. Hardin, <a href="/A222447/b222447.txt">Table of n, a(n) for n = 1..18</a>
%e A222447 Some solutions for n=3
%e A222447 ..1..1..0..0....1..1..1..0....0..0..1..0....1..0..1..1....0..0..1..1
%e A222447 ..1..0..0..0....0..1..1..1....1..1..1..1....1..0..1..1....1..0..1..0
%e A222447 ..0..1..1..1....1..0..0..1....0..0..1..1....1..0..1..1....1..1..1..1
%K A222447 nonn
%O A222447 1,1
%A A222447 _R. H. Hardin_ Feb 20 2013