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A219399
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Unchanging value maps: number of nX4 binary arrays indicating the locations of corresponding elements unequal to no king-move neighbor in a random 0..1 nX4 array
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1
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7, 7, 43, 165, 649, 2527, 10011, 39787, 157725, 623929, 2468377, 9771861, 38692747, 153187901, 606420643, 2400630287, 9503657933, 37623622731, 148945583497, 589647430651, 2334303207355, 9241081910623, 36583780864769, 144828561920695
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OFFSET
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1,1
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COMMENTS
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Column 4 of A219403
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..75
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FORMULA
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Empirical: a(n) = 5*a(n-1) -7*a(n-2) +8*a(n-3) +19*a(n-4) -19*a(n-5) -17*a(n-6) +26*a(n-7) -13*a(n-8) -41*a(n-9) -11*a(n-10) -14*a(n-11) +18*a(n-12) +45*a(n-13) -11*a(n-14) -36*a(n-15) +8*a(n-16) +17*a(n-17) -5*a(n-18) -5*a(n-19) +2*a(n-20) for n>21
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EXAMPLE
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Some solutions for n=3
..0..0..0..1....0..0..1..1....1..1..1..1....0..0..0..1....0..0..1..1
..0..0..0..1....0..0..0..1....1..0..0..0....0..0..0..1....0..0..0..0
..1..1..1..1....0..0..0..1....1..0..0..0....0..0..0..1....1..1..0..0
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CROSSREFS
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Sequence in context: A151791 A022667 A143430 * A219447 A271064 A173294
Adjacent sequences: A219396 A219397 A219398 * A219400 A219401 A219402
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Nov 19 2012
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STATUS
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approved
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