A278891 Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

0, 161, 52424, 6888340, 518626568, 27351484380, 1123462079180, 38208069702548, 1117773552649752, 28854012889071265, 669117722718849452, 14125545954412619268, 274254133053070192532, 4937202122626940281323

Offset

1,2

Comments

Column 3 of A278896.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..0..1..2. .2..3..2. .3..2..3. .2..0..1. .0..3..3. .1..3..1. .3..0..2
..3..3..2. .2..1..2. .0..2..3. .1..3..1. .0..0..2. .1..1..3. .2..3..3
..1..1..3. .1..1..1. .0..0..3. .1..0..0. .1..0..3. .0..1..1. .0..0..2

Crossrefs

Cf. A278896.

Sequence in context: A207012 A203334 A272355 * A232294 A203053 A232367

Adjacent sequences: A278888 A278889 A278890 * A278892 A278893 A278894

Keyword

nonn

Author

R. H. Hardin, Nov 30 2016

Status

approved