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A235666 Number of (2+1)X(n+1) 0..3 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise 1
3038, 105752, 3405756, 98555090, 2711168860, 71121044662, 1810928557276, 44992556226908, 1098636100890368, 26463799388634494, 631069393721184736, 14932511035514783692, 351283388673654775074, 8227223033013741388748 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A235665

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A108706 A235218 A235662 * A235427 A326416 A236297

Adjacent sequences:  A235663 A235664 A235665 * A235667 A235668 A235669

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2014

STATUS

approved

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Last modified February 18 02:57 EST 2020. Contains 332006 sequences. (Running on oeis4.)