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A259769 Number of (n+2) X (5+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 or 00000101. 1

%I #6 Apr 18 2023 15:02:42

%S 376,564,612,474,400,798,524,450,588,644,540,568,1060,716,692,1108,

%T 1092,902,896,1610,1112,1022,1552,1406,1180,1216,2116,1448,1408,2344,

%U 2016,1686,1688,2906,1988,1882,3060,2492,2108,2152,3652,2468,2412,4124,3264

%N Number of (n+2) X (5+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 or 00000101.

%C Column 5 of A259770.

%H R. H. Hardin, <a href="/A259769/b259769.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-7) -2*a(n-21) +a(n-28) for n>34.

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A259770.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 04 2015

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Last modified April 18 04:31 EDT 2024. Contains 371767 sequences. (Running on oeis4.)