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A236785 Number of (n+1)X(4+1) 0..2 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal 1
2475, 19851, 145124, 1287919, 10951425, 101820364, 921870137, 8733287503, 81211467440, 774898990883, 7293638090037, 69775296750588, 660733874896417, 6326252988398973, 60109364320802748, 575636103622182519 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A236789

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A183703 A282559 A278733 * A020411 A124594 A241048

Adjacent sequences:  A236782 A236783 A236784 * A236786 A236787 A236788

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 31 2014

STATUS

approved

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Last modified January 25 21:23 EST 2021. Contains 340427 sequences. (Running on oeis4.)