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A207603 Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically 1

%I #5 Mar 31 2012 12:37:18

%S 12,144,396,1089,6765,42025,157440,589824,3005184,15311569,64177113,

%T 268992801,1274751324,6041020176,26465410620,115943655025,

%U 534003435845,2459467656361,10969953831936,48929241563136,222765694221312

%N Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically

%C Row 6 of A207599

%H R. H. Hardin, <a href="/A207603/b207603.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) -5*a(n-2) +26*a(n-3) +226*a(n-4) +190*a(n-5) +1260*a(n-6) -6300*a(n-8) -4750*a(n-9) -28250*a(n-10) -16250*a(n-11) +15625*a(n-12) -15625*a(n-13) +78125*a(n-14)

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 19 2012

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Last modified May 3 01:16 EDT 2024. Contains 372203 sequences. (Running on oeis4.)