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A233028 Number of (n+1)X(1+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal 1
34, 96, 333, 912, 2874, 8070, 25028, 71492, 221072, 637090, 1967353, 5696300, 17569092, 51022742, 157190828, 457507314, 1408016908, 4105250676, 12622211969, 36855295684, 113218810762, 330996127114, 1016009702826, 2973522638274 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A233031

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..43

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A160062 A247218 A233031 * A044221 A044602 A159904

Adjacent sequences:  A233025 A233026 A233027 * A233029 A233030 A233031

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 03 2013

STATUS

approved

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Last modified June 19 23:27 EDT 2021. Contains 345154 sequences. (Running on oeis4.)