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A237780 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
256, 1764, 12328, 86736, 610052, 4293744, 30217760, 212542304, 1495366768, 10525153280, 74070550592, 520994891136, 3665527224832, 25799896109056, 181566255460096, 1277095009756160, 8985167874906624, 63242311835283456 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237785

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 2584*a(n-4) -329840*a(n-8) +11009280*a(n-12) -157232128*a(n-16) +824834048*a(n-20) +1067106304*a(n-24) -9353953280*a(n-28) +10336862208*a(n-32) for n>35

EXAMPLE

Some solutions for n=4

..2..1....2..2....0..2....3..0....3..3....0..0....2..3....3..1....2..0....3..2

..2..3....0..3....2..1....3..3....3..1....2..1....3..1....0..1....2..1....1..0

..2..0....2..3....2..1....1..3....2..3....2..1....3..3....1..2....1..0....2..0

..2..2....0..0....1..3....3..2....2..3....1..1....3..2....0..2....2..2....2..2

..1..0....3..1....2..2....2..1....0..0....2..2....3..2....1..1....2..2....3..0

CROSSREFS

Sequence in context: A238054 A238049 A237785 * A237904 A237899 A238311

Adjacent sequences:  A237777 A237778 A237779 * A237781 A237782 A237783

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 13 2014

STATUS

approved

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Last modified October 6 00:49 EDT 2022. Contains 357261 sequences. (Running on oeis4.)