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

Author

R. H. Hardin, Nov 24 2016

Keywords

• nonn

Comments

Column 7 of A278627.

Examples

			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
		

Links

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

Crossrefs

Cf. A278627.