A278797 Number of nX6 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

2128, 4888659, 7804657491, 11262497170744, 14688350983557860, 17132175867394310218, 17905720402390042972393, 16929268110709399178933670, 14654548270532478576848465454, 11752173813052078583219415650082

Offset

1,1

Comments

Column 6 of A278798.

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Cf. A278798.

Sequence in context: A321117 A337644 A278552 * A251134 A338070 A210271

Adjacent sequences: A278794 A278795 A278796 * A278798 A278799 A278800

Keyword

nonn

Author

R. H. Hardin, Nov 28 2016

Status

approved