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A207957 Number of nX5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically 1

%I #5 Mar 31 2012 12:37:20

%S 13,169,699,3080,15839,84013,463482,2593815,14711595,84048508,

%T 482923435,2784827479,16101364492,93259442297,540832199853,

%U 3139061893334,18230253959839,105915789772767,615530706047318,3577847973579475

%N Number of nX5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically

%C Column 5 of A207960

%H R. H. Hardin, <a href="/A207957/b207957.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 11*a(n-1) -14*a(n-2) -203*a(n-3) +563*a(n-4) +1329*a(n-5) -5460*a(n-6) -3116*a(n-7) +25220*a(n-8) -3605*a(n-9) -62985*a(n-10) +33885*a(n-11) +86009*a(n-12) -71075*a(n-13) -59522*a(n-14) +69044*a(n-15) +15374*a(n-16) -32682*a(n-17) +2168*a(n-18) +6860*a(n-19) -1480*a(n-20) -448*a(n-21) +128*a(n-22) for n>23

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 21 2012

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)