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A237723 Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
81, 348, 1510, 6610, 28877, 125428, 545952, 2381432, 10387640, 45202024, 196926732, 858105896, 3741077036, 16288858480, 70985020400, 309213392896, 1347842152080, 5869702992128, 25582079644992, 111424176258848 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237730

LINKS

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

FORMULA

Empirical: a(n) = 272*a(n-4) +1668*a(n-6) +172*a(n-8) +16*a(n-10) for n>13

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A237324 A237730 A237317 * A237472 A237465 A236997

Adjacent sequences:  A237720 A237721 A237722 * A237724 A237725 A237726

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 12 2014

STATUS

approved

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Last modified June 29 14:46 EDT 2022. Contains 354913 sequences. (Running on oeis4.)