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A224124 Number of 2Xn 0..3 arrays with row sums nondecreasing and column sums unimodal 1
10, 150, 1747, 16782, 140210, 1050460, 7227405, 46371039, 281020959, 1623035066, 9002891450, 48234712165, 250875276249, 1271548675730, 6302249244967, 30627310088497, 146302624587552, 688283767932118, 3194839035650041 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A224123

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..72

EXAMPLE

Some solutions for n=3

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

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

CROSSREFS

Sequence in context: A212471 A157867 A116156 * A212472 A025750 A034325

Adjacent sequences:  A224121 A224122 A224123 * A224125 A224126 A224127

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 31 2013

STATUS

approved

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Last modified June 26 20:37 EDT 2019. Contains 324380 sequences. (Running on oeis4.)