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A218760 Unmatched value maps: number of nX3 binary arrays indicating the locations of corresponding elements not equal to any horizontal or vertical neighbor in a random 0..1 nX3 array 1

%I

%S 4,18,90,403,1876,8697,40383,187413,869598,4035492,18727387,86907272,

%T 403304737,1871588753,8685363409,40305616278,187043701224,

%U 868001747571,4028080274884,18692855005565,86746738864403,402560052640421

%N Unmatched value maps: number of nX3 binary arrays indicating the locations of corresponding elements not equal to any horizontal or vertical neighbor in a random 0..1 nX3 array

%C Column 3 of A218765

%H R. H. Hardin, <a href="/A218760/b218760.txt">Table of n, a(n) for n = 1..63</a>

%F Empirical: a(n) = 4*a(n-1) +a(n-2) +7*a(n-3) +11*a(n-4) +2*a(n-5) -28*a(n-6) -11*a(n-7) -4*a(n-8) -13*a(n-9) +12*a(n-10) -137*a(n-11) -48*a(n-12) +129*a(n-13) +31*a(n-14) -51*a(n-15) -32*a(n-16) +6*a(n-17) +10*a(n-18) +2*a(n-19)

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 05 2012

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Last modified February 6 23:12 EST 2023. Contains 360111 sequences. (Running on oeis4.)