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A278626 Number of nX7 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake. 1
504, 103546, 24103803, 6594175430, 1892563134910, 540194658701142, 152561415660718514, 42854095125044269456, 11909803616605399424974, 3223604568067184016119193, 835430834890906525681829626 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A278627.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A278627.

Sequence in context: A291116 A145095 A035293 * A288851 A105097 A278308

Adjacent sequences:  A278623 A278624 A278625 * A278627 A278628 A278629

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 24 2016

STATUS

approved

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Last modified December 9 08:41 EST 2021. Contains 349627 sequences. (Running on oeis4.)