A194501 - OEIS

A194501

Number of lower triangles of an n X n 0..4 array with each element unequal to the sum mod 5 of its horizontal and vertical neighbors

%I #5 Dec 18 2015 18:17:43

%S 4,64,4160,1048560,1073741824,4398046511104,72057594037927936

%N Number of lower triangles of an n X n 0..4 array with each element unequal to the sum mod 5 of its horizontal and vertical neighbors

%C Column 4 of A194505

%e Some solutions for 3X3

%e ..0......1......3......1......0......1......2......2......4......1......0

%e ..2.0....0.3....2.4....0.2....1.0....4.0....4.2....0.4....2.3....2.2....3.4

%e ..4.1.4..2.4.0..1.1.4..1.4.2..0.3.1..0.0.2..3.1.2..2.0.1..3.4.0..3.3.4..3.2.4

%K nonn

%O 1,1

%A _R. H. Hardin_ Aug 27 2011