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A260977
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Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101
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1
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1146, 925, 1288, 2714, 4592, 9144, 14672, 29768, 50432, 101372, 171124, 340878, 582500, 1157798, 1990592, 3921926, 6784120, 13315792, 23162244, 45162484, 78973048, 153447472, 269491716, 520685028, 918595544, 1769858760, 3133573780
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 12*a(n-4) +4*a(n-5) +4*a(n-7) -15*a(n-8) -32*a(n-9) -3*a(n-10) -34*a(n-11) +a(n-12) +16*a(n-13) +8*a(n-14) +28*a(n-15) -51*a(n-16) +40*a(n-17) +16*a(n-18) -36*a(n-19) +33*a(n-20) +224*a(n-21) -4*a(n-23) +64*a(n-24) +128*a(n-25) -24*a(n-27) +64*a(n-28) for n>34
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EXAMPLE
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Some solutions for n=4
..1..0..0..1..0..0..0....0..0..0..0..0..0..0....1..0..0..0..1..0..0
..0..0..0..0..0..1..0....0..1..0..0..0..0..1....0..0..0..1..0..0..0
..0..0..0..0..1..0..0....1..0..0..1..0..0..0....0..1..0..0..0..1..0
..0..1..0..0..0..0..1....0..0..1..0..0..0..0....1..0..0..0..1..0..0
..1..0..0..1..0..0..0....0..0..0..0..1..0..0....0..0..1..0..0..0..1
..0..0..1..0..0..1..0....0..1..0..1..0..0..1....0..1..0..0..0..1..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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