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A225020 Number of (n+1)X2 0..2 matrices with each 2X2 permanent equal 1

%I #4 Apr 24 2013 08:51:56

%S 81,253,759,2653,9273,34545,130067,502563,1957855,7707477,30479641,

%T 121049341,481805459,1921111559,7667874767,30628405561,122397615337,

%U 489285404561,1956323203363,7823125185531,31286692332191,125131311950285

%N Number of (n+1)X2 0..2 matrices with each 2X2 permanent equal

%C Column 1 of A225027

%H R. H. Hardin, <a href="/A225020/b225020.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 6*a(n-1) +8*a(n-2) -89*a(n-3) -3*a(n-4) +522*a(n-5) -118*a(n-6) -1489*a(n-7) +342*a(n-8) +2002*a(n-9) -380*a(n-10) -992*a(n-11) +192*a(n-12)

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 24 2013

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Last modified February 21 16:42 EST 2024. Contains 370237 sequences. (Running on oeis4.)