login
Number of lower triangles of an n X n 0..7 array with new values introduced in row major order 0..7 and no element equal to more than two horizontal or vertical neighbors
0

%I #5 Dec 18 2015 18:17:44

%S 1,5,194,110064,1237399743,230795314260831,443383367826271457152,

%T 7112925826561472131385895933

%N Number of lower triangles of an n X n 0..7 array with new values introduced in row major order 0..7 and no element equal to more than two horizontal or vertical neighbors

%C Column 7 of A194576

%e Some solutions for 3X3

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

%e ..0.0....1.0....0.1....1.2....1.0....1.2....0.1....0.0....0.1....0.1....1.2

%e ..1.1.1..2.2.0..2.2.1..1.1.0..1.1.2..1.1.2..2.3.1..1.2.0..0.1.2..1.0.1..2.2.1

%K nonn

%O 1,2

%A _R. H. Hardin_ Aug 29 2011