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A228389 Number of nX7 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically. 1

%I

%S 13,169,3513,62546,1177709,21683149,402968942,7458864720,138305554175,

%T 2562514124813,47494743530686,880148347563002,16311635295084771,

%U 302290762813484314,5602201879906920864,103822064306056848780

%N Number of nX7 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically.

%C Column 7 of A228390

%H R. H. Hardin, <a href="/A228389/b228389.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 9*a(n-1) +203*a(n-2) -210*a(n-3) -5659*a(n-4) +6975*a(n-5) +48558*a(n-6) -82823*a(n-7) -127405*a(n-8) +308107*a(n-9) +21372*a(n-10) -340142*a(n-11) +100779*a(n-12) +139011*a(n-13) -54187*a(n-14) -25564*a(n-15) +9369*a(n-16) +2227*a(n-17) -546*a(n-18) -87*a(n-19) +9*a(n-20) +a(n-21)

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Aug 21 2013

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Last modified October 22 06:54 EDT 2019. Contains 328315 sequences. (Running on oeis4.)