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A235561 Number of (n+1)X(2+1) 0..2 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise 1
537, 8345, 113391, 1383617, 15633605, 165947729, 1680360507, 16368643767, 154629524369, 1423864504941, 12838948846501, 113734761931057, 992623171694623, 8553532264219381, 72908918920145825, 615658688491607859 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235565

LINKS

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

R. H. Hardin, Empirical recurrence of order 67

FORMULA

Empirical recurrence of order 67 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A183725 A235780 A235785 * A252339 A224742 A231194

Adjacent sequences:  A235558 A235559 A235560 * A235562 A235563 A235564

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 12 2014

STATUS

approved

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Last modified July 6 02:23 EDT 2022. Contains 355108 sequences. (Running on oeis4.)