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A222158 Number of nX6 arrays with each row a permutation of 1..6 having at least as many downsteps as the preceding row, with rows in lexicographically nondecreasing order 1
720, 215659, 38778082, 4900249687, 474541614240, 37174156067106, 2443652727700740, 138390122328018723, 6886742682955869488, 305784165735033471729, 12263159054342175847892, 448624205061282686849788 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A222159

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..209

EXAMPLE

Some solutions for n=3

..1..2..4..6..3..5....1..4..5..6..3..2....1..2..3..5..4..6....1..2..4..3..5..6

..1..3..5..6..4..2....1..5..4..3..2..6....1..2..4..5..3..6....1..3..4..6..5..2

..1..4..6..3..2..5....1..6..4..3..5..2....1..2..6..5..4..3....1..6..3..2..5..4

CROSSREFS

Sequence in context: A221436 A239184 A003439 * A145093 A221621 A054779

Adjacent sequences:  A222155 A222156 A222157 * A222159 A222160 A222161

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 10 2013

STATUS

approved

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Last modified October 17 02:45 EDT 2021. Contains 348048 sequences. (Running on oeis4.)