A278623 Number of n X 4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

51, 1952, 49503, 1069536, 21121532, 387542112, 6594175430, 103536313036, 1496475492375, 19928249063688, 245280439959902, 2802425055340520, 29863427285241827, 298206737876251916, 2802780797553511873

Offset

1,1

Comments

Column 4 of A278627.

Links

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

R. H. Hardin, Empirical polynomial of degree 125

Formula

Empirical polynomial of degree 125 (see link above).

Example

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

Crossrefs

Cf. A278627.

Sequence in context: A202044 A238319 A014943 * A288604 A278305 A231660

Adjacent sequences: A278620 A278621 A278622 * A278624 A278625 A278626

Keyword

nonn

Author

R. H. Hardin, Nov 24 2016

Status

approved