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A228388 Number of nX6 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically. 1

%I #7 Sep 01 2013 18:28:51

%S 8,70,963,11449,143072,1755243,21683149,267157140,3294926929,

%T 40621769739,500881862476,6175719012200,76146337618146,

%U 938873253971283,11576206633106083,142733217148402101,1759883977929944820

%N Number of nX6 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically.

%C Column 6 of A228390

%H R. H. Hardin, <a href="/A228388/b228388.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 8*a(n-1) +62*a(n-2) -78*a(n-3) -375*a(n-4) +300*a(n-5) +486*a(n-6) -385*a(n-7) -30*a(n-8) +52*a(n-9) -2*a(n-10) -a(n-11)

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Aug 21 2013

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)