A222895 - OEIS

%I #5 Dec 18 2015 18:18:28

%S 3,31,621,230803,129912903

%N Number of n X n 0..2 arrays with successive rows and columns fitting to straight lines with strictly increasing slope, with a single point array taken as having zero slope

%C Diagonal of A222896

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 08 2013