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A260760 Number of (n+2)X(1+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011 1

%I #4 Jul 30 2015 22:45:53

%S 48,82,190,350,622,1315,2478,4597,9184,17591,33096,64829,124590,

%T 236647,458914,883290,1686838,3255660,6266216,12003508,23114992,

%U 44476139,85340062,164169628,315782978,606459354,1166124310,2242522630,4308761510

%N Number of (n+2)X(1+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011

%C Column 1 of A260767

%H R. H. Hardin, <a href="/A260760/b260760.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 4*a(n-3) +3*a(n-4) +2*a(n-5) +5*a(n-6) +5*a(n-8) +2*a(n-9) +3*a(n-10) +4*a(n-11) +2*a(n-12) +6*a(n-13) +a(n-14) for n>15

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A260767

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 30 2015

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Last modified March 28 14:33 EDT 2024. Contains 371254 sequences. (Running on oeis4.)