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%I #5 Dec 18 2015 18:18:28
%S 4,106,10896,26220153,263793650432
%N Number of n X n 0..3 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 A222931
%e Some solutions for n=3
%e ..2..1..2....3..2..1....3..0..1....3..1..0....1..0..0....1..1..0....2..0..0
%e ..0..0..1....0..3..0....3..2..2....3..2..1....0..2..0....1..3..1....2..0..1
%e ..1..1..3....1..3..3....2..0..2....0..0..3....1..1..2....0..3..3....0..1..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 09 2013