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A236124
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Number of (n+1)X(1+1) 0..3 arrays colored with the maximum plus the upper median minus the lower median of every 2X2 subblock
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1
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256, 2782, 30660, 337810, 3723012, 41005528, 451716944, 4976199592, 54818616784, 603883903276, 6652433429276, 73283772351660, 807300186654896, 8893283636544700, 97969139280841724, 1079236054749770148
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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) = 366*a(n-3) +5214*a(n-4) +31156*a(n-5) +218596*a(n-6) +873948*a(n-7) +2635751*a(n-8) +5977356*a(n-9) -16093852*a(n-10) -118223502*a(n-11) -524290652*a(n-12) -1690658088*a(n-13) -1592328920*a(n-14) +2665018428*a(n-15) +26560571720*a(n-16) +105162595088*a(n-17) +148035552816*a(n-18) +69121017376*a(n-19) -494484957456*a(n-20) -2549401014912*a(n-21) -3683380168064*a(n-22) -1704351546880*a(n-23) +4457382091776*a(n-24) +26850059834368*a(n-25) +39027657178112*a(n-26) +4608574113792*a(n-27) -39172991209472*a(n-28) -121770582523904*a(n-29) -167682872999936*a(n-30) +44004650811392*a(n-31) +256981414051840*a(n-32) +167599333048320*a(n-33) +6043975286784*a(n-34) -84314060488704*a(n-35) -108348177383424*a(n-36) -43980599328768*a(n-37) +7552163119104*a(n-38) +6707799392256*a(n-39) +782757789696*a(n-40)
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EXAMPLE
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Some solutions for n=3
..2..1....2..3....2..3....2..0....3..0....2..1....2..0....0..1....3..0....0..0
..0..0....1..1....3..3....0..2....1..0....0..2....3..0....0..0....3..0....0..0
..0..1....3..0....2..2....0..0....0..0....2..2....3..3....3..1....3..2....1..1
..0..1....0..3....2..0....2..3....2..3....1..1....0..0....3..0....2..0....0..3
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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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