A278652 Number of nX4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

0, 1076, 210616, 20667190, 1386399220, 71471902148, 3014441325194, 108332967120296, 3414333388975884, 96390462710001643, 2476398000574388212, 58596033969288185394, 1288713602013678461961, 26531650462405865691808

Offset

1,2

Comments

Column 4 of A278656.

Links

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

Example

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

Crossrefs

Cf. A278656.

Sequence in context: A237213 A235959 A235570 * A235084 A274234 A023085

Adjacent sequences: A278649 A278650 A278651 * A278653 A278654 A278655

Keyword

nonn

Author

R. H. Hardin, Nov 25 2016

Status

approved