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A229368 Number of nX4 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 antidiagonally 1

%I #4 Sep 21 2013 05:45:38

%S 60,869,13937,222990,3576912,56939585,911301584,14532090528,

%T 232232172607,3706745079815,59203178820148,945256319974208,

%U 15094878048962231,241030410158025724,3848864771555252792,61458856647843842612

%N Number of nX4 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 antidiagonally

%C Column 4 of A229372

%H R. H. Hardin, <a href="/A229368/b229368.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +257*a(n-2) +433*a(n-3) -16073*a(n-4) -20963*a(n-5) +481391*a(n-6) +119200*a(n-7) -7182420*a(n-8) +4731824*a(n-9) +44618241*a(n-10) -29900281*a(n-11) -162825007*a(n-12) +45010518*a(n-13) +361117327*a(n-14) +96538808*a(n-15) -378171592*a(n-16) -303446432*a(n-17) +22354064*a(n-18) +83608448*a(n-19) +6923904*a(n-20) -10505152*a(n-21) -433920*a(n-22) +664576*a(n-23) -65536*a(n-24) for n>25

%e Some solutions for n=3

%e ..1..0..1..2....0..2..1..2....1..2..0..2....0..1..0..1....1..2..1..2

%e ..1..0..0..1....0..1..0..1....0..1..2..0....0..1..2..2....2..0..1..0

%e ..2..2..2..1....0..2..1..2....0..2..1..2....2..2..1..0....1..0..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 21 2013

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Last modified August 17 17:14 EDT 2024. Contains 375227 sequences. (Running on oeis4.)