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A235898 Number of (n+1)X(4+1) 0..2 arrays with the minimum plus the maximum equal to the lower median plus the upper median in every 2X2 subblock 1
1797, 17001, 148945, 1384257, 12931393, 124394337, 1221438401, 12293017761, 126561018497, 1332373322337, 14316580780609, 156716540659233, 1743686518531585, 19674932381346273, 224642399432061377 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A235902

LINKS

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

FORMULA

Empirical: a(n) = 33*a(n-1) -312*a(n-2) -360*a(n-3) +16976*a(n-4) -22128*a(n-5) -360576*a(n-6) +253440*a(n-7) +3520512*a(n-8) +3870720*a(n-9)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A249191 A234203 A220058 * A035891 A069476 A179695

Adjacent sequences:  A235895 A235896 A235897 * A235899 A235900 A235901

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2014

STATUS

approved

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Last modified May 23 10:51 EDT 2022. Contains 353975 sequences. (Running on oeis4.)