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A236974 Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal 1
1238, 9854, 76212, 635960, 5259146, 44597946, 376887360, 3222991866, 27520095568, 236568864708, 2032537681056, 17535842104346, 151294565594066, 1308890744507700, 11327010592855074, 98206225621215244, 851830423648769622 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236979

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A179913 A161868 A145047 * A237552 A010081 A028514

Adjacent sequences:  A236971 A236972 A236973 * A236975 A236976 A236977

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 02 2014

STATUS

approved

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Last modified June 19 11:14 EDT 2019. Contains 324219 sequences. (Running on oeis4.)