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 A261109 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101 1

%I

%S 97,206,566,1498,3908,10268,27030,70980,186290,489516,1286458,3379154,

%T 8876106,23319066,61261972,160934256,422777430,1110660098,2917747758,

%U 7665011686,20136272074,52898777022,138967021622,365071414304

%N Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101

%C Column 4 of A261113

%H R. H. Hardin, <a href="/A261109/b261109.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) +6*a(n-3) +8*a(n-4) +10*a(n-5) +11*a(n-6) +7*a(n-7) +a(n-8) -7*a(n-9) -6*a(n-10) +a(n-11) +3*a(n-12) +a(n-13) for n>14

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A261113

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 08 2015

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Last modified July 23 03:25 EDT 2019. Contains 325230 sequences. (Running on oeis4.)