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 A228687 Number of 6Xn binary arrays with no two ones adjacent horizontally, diagonally or antidiagonally. 1

%I

%S 64,239,5215,32928,475809,3837761,46125216,419022831,4618533791,

%T 44467300608,470238325217,4657579001857,48279924803328,

%U 484835649414511,4977465842992607,50320320341072096,514193976056767137

%N Number of 6Xn binary arrays with no two ones adjacent horizontally, diagonally or antidiagonally.

%C Row 6 of A228683

%H R. H. Hardin, <a href="/A228687/b228687.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 4*a(n-1) +88*a(n-2) -138*a(n-3) -1388*a(n-4) +1332*a(n-5) +5911*a(n-6) -2920*a(n-7) -8340*a(n-8) +816*a(n-9) +2232*a(n-10)

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Aug 30 2013

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Last modified May 22 02:18 EDT 2022. Contains 353933 sequences. (Running on oeis4.)