A218640 - OEIS

%I #4 Nov 03 2012 19:01:30

%S 1,1001,32689,1048353,33546641,1073471633,34351030657,1099232741569,

%T 35175445605065,1125614194685977,36019652123390673,

%U 1152628800344096833,36884119447102424865,1180291753062182528225,37769333882150509728449

%N Hilltop maps: number of 5Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 5Xn array

%C Row 5 of A218638

%H R. H. Hardin, <a href="/A218640/b218640.txt">Table of n, a(n) for n = 1..70</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Nov 03 2012