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A280857
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Number of nX6 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards.
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1
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82, 1708, 678, 462, 491, 712, 1202, 2268, 4220, 7108, 11240, 17330, 26934, 43062, 70776, 117452, 193842, 316394, 511776, 825074, 1333130, 2163076, 3521462, 5738446, 9343090, 15187700, 24659768, 40027188, 64994524, 105599072, 171639520
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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) +a(n-2) -a(n-3) +a(n-4) +6*a(n-7) -5*a(n-8) +3*a(n-9) -3*a(n-10) -3*a(n-11) +2*a(n-12) -4*a(n-13) +a(n-14) -2*a(n-15) -2*a(n-16) for n>22
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EXAMPLE
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Some solutions for n=4
..0..1..1..2..2..1. .0..1..0..1..1..2. .0..1..0..1..0..1. .0..0..1..2..2..0
..0..2..0..0..1..0. .1..2..0..2..0..0. .2..1..2..1..2..2. .1..2..1..0..1..0
..1..2..1..2..2..0. .0..2..1..2..1..2. .2..0..2..0..0..1. .1..0..2..0..2..1
..1..0..1..0..1..1. .1..0..1..0..1..0. .1..0..1..1..2..2. .2..0..1..1..2..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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