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 A184370 1/3 the number of (n+1)X4 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically 1

%I

%S 1107,49235,2167173,95528423,4210059673,185547841629,8177524177277,

%T 360402692568245,15883791500540967,700035935394350709,

%U 30852225032929689819,1359729896274471875219,59926484677950059719491

%N 1/3 the number of (n+1)X4 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically

%C Column 3 of A184376

%H R. H. Hardin, <a href="/A184370/b184370.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n)=38*a(n-1)+302*a(n-2)-1368*a(n-3)-6770*a(n-4)+12666*a(n-5)-575*a(n-6)-5790*a(n-7)+828*a(n-8)+648*a(n-9)

%e Some solutions for 3X4 with a(1,1)=0

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 12 2011

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Last modified November 26 21:15 EST 2022. Contains 358362 sequences. (Running on oeis4.)