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A269933
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Number of nX3 0..6 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling six exactly once.
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1
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84, 36312, 5695536, 755009274, 91506078732, 10536802638018, 1172354654705496, 127313882431172946, 13576906131836963556, 1427607948065847637818, 148433098389226769237376, 15291883407551679953054394
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OFFSET
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1,1
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COMMENTS
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Column 3 of A269937.
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 144*a(n-1) -244*a(n-2) -431040*a(n-3) -653070*a(n-4) +185824500*a(n-5) -1565542220*a(n-6) -2246788724*a(n-7) +49596662711*a(n-8) -28656277332*a(n-9) -578014144012*a(n-10) +498466153668*a(n-11) +3129025277000*a(n-12) -1799356594080*a(n-13) -8214266955364*a(n-14) +1238204980096*a(n-15) +7873681484512*a(n-16) -756824714624*a(n-17) -2602301179968*a(n-18) +547351490048*a(n-19) -28883682304*a(n-20) for n>21
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EXAMPLE
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Some solutions for n=2
..4..6..0. .6..2..1. .5..4..0. .1..3..4. .4..5..3. .0..5..6. .3..0..0
..6..4..3. .5..6..4. .6..1..4. .0..5..5. .5..4..2. .3..0..4. .3..2..0
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CROSSREFS
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Cf. A269937.
Sequence in context: A232914 A145495 A275452 * A184126 A185403 A269897
Adjacent sequences: A269930 A269931 A269932 * A269934 A269935 A269936
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Mar 08 2016
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STATUS
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approved
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