A278626 Number of nX7 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

504, 103546, 24103803, 6594175430, 1892563134910, 540194658701142, 152561415660718514, 42854095125044269456, 11909803616605399424974, 3223604568067184016119193, 835430834890906525681829626

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