%I #3 Nov 03 2012 19:02:35

%S 1,16001,2092027,268378101,34351677143,4396930705721,562806164441653,

%T 72039176523059285

%N Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 7Xn array

%C Row 7 of A218638

%e Some solutions for n=3

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

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

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Nov 03 2012