%I #10 Oct 03 2025 10:15:28

%S 1,64,716430,93604950539,314892411482182670,40799258353982022255077487

%N Number of n X n 0..7 arrays with every nonzero element less than or equal to some NW, E or S neighbor.

%C Diagonal of A203262

%e Some solutions for n=4

%e ..2..3..0..6....4..5..2..0....6..0..1..0....5..3..2..3....7..2..5..7

%e ..4..6..3..6....6..5..7..3....7..0..5..1....6..4..1..5....7..0..0..7

%e ..2..6..7..6....6..4..7..3....7..0..5..3....7..3..5..5....7..2..7..7

%e ..3..6..7..7....6..6..7..7....7..7..5..5....7..7..4..5....7..7..4..7

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 30 2011