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A235662 Number of (n+1)X(2+1) 0..3 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise 1
3038, 105752, 3377510, 97225212, 2654051460, 69130583300, 1747603214578, 43136654198960, 1047132137240314, 25095456411611898, 595867012132487010, 14049371809599315902, 329547900284607478246, 7700165644063519174328 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235665

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A145049 A108706 A235218 * A235666 A235427 A326416

Adjacent sequences:  A235659 A235660 A235661 * A235663 A235664 A235665

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2014

STATUS

approved

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Last modified October 29 04:54 EDT 2020. Contains 338066 sequences. (Running on oeis4.)