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A207882 Number of nX5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 1 0 vertically 1

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

%S 13,169,493,1360,4387,14225,49586,175747,645245,2403872,9120677,

%T 34960907,135357992,527526895,2067755087,8138519992,32142126101,

%U 127268868773,504981199930,2006919956813,7986355654043,31813478437106,126832238503405

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

%C Column 5 of A207885

%H R. H. Hardin, <a href="/A207882/b207882.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 10*a(n-1) -10*a(n-2) -192*a(n-3) +523*a(n-4) +1371*a(n-5) -5841*a(n-6) -3846*a(n-7) +32138*a(n-8) -2492*a(n-9) -101383*a(n-10) +45525*a(n-11) +191278*a(n-12) -128400*a(n-13) -213000*a(n-14) +178176*a(n-15) +129368*a(n-16) -132968*a(n-17) -32752*a(n-18) +50112*a(n-19) -1856*a(n-20) -7296*a(n-21) +1536*a(n-22) for n>23

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 21 2012

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Last modified April 23 10:13 EDT 2024. Contains 371905 sequences. (Running on oeis4.)