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 A237939 Number of (n+1)X(2+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal 1

%I

%S 437,5519,70435,946063,12909207,178348911,2478121687,34547541807,

%T 482441897847,6743242294207,94297236738151,1318980922040111,

%U 18451660550452439,258144363280637727,3611650688217168775

%N Number of (n+1)X(2+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal

%C Column 2 of A237945

%H R. H. Hardin, <a href="/A237939/b237939.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 20*a(n-1) -56*a(n-2) -524*a(n-3) +1719*a(n-4) +2496*a(n-5) -12490*a(n-6) +8016*a(n-7) +10172*a(n-8) -11936*a(n-9) +1560*a(n-10) +1344*a(n-11) -320*a(n-12)

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 16 2014

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Last modified August 11 19:26 EDT 2022. Contains 356066 sequences. (Running on oeis4.)