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A260136
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Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 01010101 or 01010111
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1
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944, 3928, 22522, 85048, 365308, 1799114, 7839850, 33893514, 155470816, 697051946, 3073153820, 13791352932, 61881071698, 275443687654, 1230459293574, 5508072254348, 24593824347286, 109832226922584, 491024767206608
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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) = a(n-1) +3*a(n-2) +61*a(n-3) +47*a(n-4) -60*a(n-5) -990*a(n-6) -1180*a(n-7) +352*a(n-8) +8249*a(n-9) +7603*a(n-10) -2855*a(n-11) -30388*a(n-12) -20354*a(n-13) +5185*a(n-14) +61744*a(n-15) +24167*a(n-16) -8563*a(n-17) -72780*a(n-18) -8588*a(n-19) +15051*a(n-20) +61538*a(n-21) -6778*a(n-22) -13766*a(n-23) -35716*a(n-24) +1294*a(n-25) +5880*a(n-26) +10338*a(n-27) +1680*a(n-28) -1116*a(n-30) for n>32
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EXAMPLE
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Some solutions for n=4
..1..0..1..0..1..0..1..0....1..1..0..1..1..1..0..0....1..1..1..0..0..0..1..0
..0..0..0..1..1..1..0..1....1..0..1..0..1..0..1..0....0..1..0..1..0..1..0..0
..1..0..1..0..1..0..1..0....0..1..0..1..0..1..0..1....1..0..1..0..1..0..1..0
..0..1..0..1..0..1..0..1....1..0..1..0..0..0..1..1....0..1..0..1..0..1..0..1
..1..0..1..0..1..0..1..0....0..0..0..1..0..1..0..1....0..0..1..0..1..0..1..0
..1..1..0..1..0..1..1..1....0..0..1..0..1..0..1..0....0..1..0..1..1..1..0..1
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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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