A231956 - OEIS

%I #4 Nov 15 2013 19:33:41

%S 12512,3295580,732691918,171279257338,40322931224352,9478886429386626,

%T 2227569337736429246,523508634894235102896,123033126916188723929280,

%U 28914771603349522608580808,6795434605065557633557620296

%N Number of (n+1)X(7+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero

%C Column 7 of A231957

%H R. H. Hardin, <a href="/A231956/b231956.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 15 2013