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A236871 Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock equal 1
4131, 46023, 499947, 5913287, 68777909, 826928057, 9850162103, 119172787543, 1434649920667, 17412329016137, 210815312004247, 2564264418734901, 31158752923844559, 379690905863880779, 4625670882160203303 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A236875

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A125502 A168631 A117810 * A300194 A188254 A162003

Adjacent sequences:  A236868 A236869 A236870 * A236872 A236873 A236874

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2014

STATUS

approved

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Last modified December 16 09:06 EST 2019. Contains 330020 sequences. (Running on oeis4.)