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A235667 Number of (3+1)X(n+1) 0..3 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise 1
33610, 3377510, 314516602, 25757334784, 1985139761308, 143468661921620, 9943144779735306, 663721389380552504, 43067478348737689590, 2728158285998906700578, 169524380931449477078492 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A235665

LINKS

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

EXAMPLE

Some solutions for n=1

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

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

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

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

CROSSREFS

Sequence in context: A217565 A142587 A116496 * A235663 A235428 A178280

Adjacent sequences:  A235664 A235665 A235666 * A235668 A235669 A235670

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2014

STATUS

approved

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Last modified February 27 10:15 EST 2020. Contains 332304 sequences. (Running on oeis4.)