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A261551 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011. 1

%I

%S 336,484,754,769,816,1286,1510,1615,2362,3215,3431,4393,7048,7780,

%T 8410,13211,16608,17829,24668,36190,39242,46637,73624,86018,93335,

%U 138721,186633,201052,260339,393430,441304,504693,773636,962188,1043739,1459993

%N Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011.

%C Column 4 of A261553.

%H R. H. Hardin, <a href="/A261551/b261551.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 4*a(n-7) +4*a(n-10) +2*a(n-13) -3*a(n-14) -2*a(n-17) +a(n-20) -4*a(n-21) -4*a(n-23) -8*a(n-24) -a(n-26) -6*a(n-27) +3*a(n-28) +3*a(n-34) +2*a(n-35) +2*a(n-38) for n>44

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A261553.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 24 2015

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Last modified August 14 13:00 EDT 2020. Contains 336480 sequences. (Running on oeis4.)