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A237293
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Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock equal
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1
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256, 1128, 5360, 27376, 145488, 802992, 4552384, 26458368, 156639808, 942349824, 5736317696, 35260388992, 218279005440, 1358969009152, 8495762042880, 53287015270400, 335031293455360, 2110452904770560, 13313109048823808
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OFFSET
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1,1
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COMMENTS
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Column 1 of A237299
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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) = 18*a(n-1) -80*a(n-2) -356*a(n-3) +3712*a(n-4) -3672*a(n-5) -46200*a(n-6) +121376*a(n-7) +223024*a(n-8) -1056416*a(n-9) -188480*a(n-10) +4472000*a(n-11) -2103552*a(n-12) -10322304*a(n-13) +8097920*a(n-14) +13459968*a(n-15) -12348928*a(n-16) -9893888*a(n-17) +8663040*a(n-18) +3891200*a(n-19) -2293760*a(n-20) -655360*a(n-21)
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EXAMPLE
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Some solutions for n=5
..0..3....0..2....2..2....0..0....2..1....2..3....0..0....2..2....0..2....0..3
..1..1....1..2....3..0....0..1....2..1....1..3....1..1....3..3....1..2....3..1
..3..0....0..2....1..3....1..3....0..1....0..3....0..2....2..2....2..2....3..2
..1..1....2..1....2..3....1..2....2..1....3..1....1..3....1..1....3..0....3..3
..2..1....3..3....2..0....0..0....0..1....2..3....0..2....1..1....1..3....3..2
..0..0....1..0....1..2....1..0....0..1....0..2....1..1....1..1....3..2....3..1
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CROSSREFS
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Sequence in context: A237694 A237688 A237299 * A206118 A206111 A237211
Adjacent sequences: A237290 A237291 A237292 * A237294 A237295 A237296
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 06 2014
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STATUS
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approved
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