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A237786 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the minimum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
256, 1902, 14369, 108626, 822482, 6206506, 46951577, 354492388, 2682430004, 20249512232, 153214659580, 1156665099968, 8751938508392, 66070136649952, 499917695693080, 3773995527721904, 28555890125652136, 215574798983581408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237791

LINKS

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

FORMULA

Empirical: a(n) = 2044*a(n-4) +57712*a(n-6) +627304*a(n-8) +2916648*a(n-10) +5816832*a(n-12) +11824576*a(n-14) +34380288*a(n-16) +53691776*a(n-18) +42450944*a(n-20) +56373760*a(n-22) +52514816*a(n-24) +67936256*a(n-26) +35323904*a(n-28) +5242880*a(n-30)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A237539 A206745 A237791 * A238063 A238058 A235972

Adjacent sequences:  A237783 A237784 A237785 * A237787 A237788 A237789

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 13 2014

STATUS

approved

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Last modified September 28 17:45 EDT 2022. Contains 357080 sequences. (Running on oeis4.)