A278632 Number of nX6 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

357, 175881, 48592635, 11719632199, 2593097277036, 521528860552802, 94782697883923436, 15624069731088285787, 2357725621673408985921, 329332639476242364241409, 43040255418713805460253898

Offset

1,1

Comments

Column 6 of A278634.

Links

R. H. Hardin, Table of n, a(n) for n = 1..46

Example

Some solutions for n=2
..1..0..0..2..1..0. .0..0..0..2..0..2. .1..0..1..2..0..0. .2..1..0..0..2..0
..2..0..1..1..1..2. .1..1..0..0..0..2. .2..1..1..2..0..0. .0..0..2..1..0..2

Crossrefs

Cf. A278634.

Sequence in context: A166913 A224434 A278412 * A108875 A236159 A280403

Adjacent sequences: A278629 A278630 A278631 * A278633 A278634 A278635

Keyword

nonn

Author

R. H. Hardin, Nov 24 2016

Status

approved