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A201699 Number of nX7 0..2 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards 1
3, 60, 3838, 607919, 142436489, 27102769900, 3262897246338, 253484699853930, 13657827589827288, 542530203631847499, 16634470482072064655, 407700696414920035296, 8211702473582080609860, 139013768818199221546289 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A201700

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..22

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A085990 A202065 A036770 * A006821 A165626 A120307

Adjacent sequences:  A201696 A201697 A201698 * A201700 A201701 A201702

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 03 2011

STATUS

approved

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Last modified October 19 01:25 EDT 2019. Contains 328211 sequences. (Running on oeis4.)