A278431 Number of nX3 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

40, 1609, 57760, 2116789, 67971132, 1796061464, 39513263094, 743248079740, 12242795030458, 179948822861856, 2394561544941994, 29174653111810701, 328380943500399272, 3439574456695348801, 33729578625174035514

Offset

1,1

Comments

Column 3 of A278435.

Links

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

R. H. Hardin, Empirical polynomial of degree 127

Formula

Empirical polynomial of degree 127 (see link above)

Example

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

Crossrefs

Cf. A278435.

Sequence in context: A009984 A041761 A229635 * A229584 A140702 A223609

Adjacent sequences: A278428 A278429 A278430 * A278432 A278433 A278434

Keyword

nonn

Author

R. H. Hardin, Nov 22 2016

Status

approved