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A238058 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
256, 1910, 14429, 109386, 828750, 6261150, 47346273, 358316792, 2711887788, 20506077144, 155139948464, 1173585528600, 8880284390128, 67163140049616, 508174004578308, 3843778132646744, 29083916585165508, 219977779917187008 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A238063

LINKS

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

FORMULA

Empirical: a(n) = 2348*a(n-4) +50196*a(n-6) +164236*a(n-8) -42860*a(n-10) +2752240*a(n-12) -2760128*a(n-14) +10991872*a(n-16) -60822016*a(n-18) -31266816*a(n-20) +26937344*a(n-22) +27664384*a(n-24) +6701056*a(n-26)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A237791 A237786 A238063 * A235972 A235965 A206188

Adjacent sequences:  A238055 A238056 A238057 * A238059 A238060 A238061

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved

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Last modified August 5 01:32 EDT 2021. Contains 346456 sequences. (Running on oeis4.)