A278729 Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

40, 1947, 58904, 1410818, 28637916, 506031118, 7907770636, 110655824716, 1401584381570, 16222274394016, 173007912264684, 1712497545142699, 15831976807688826, 137451501603516285, 1125976516897709842

Offset

1,1

Comments

Column 3 of A278734.

Links

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

R. H. Hardin, Empirical polynomial of degree 109

Formula

Empirical polynomial of degree 109 (see link above)

Example

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

Crossrefs

Cf. A278734.

Sequence in context: A308836 A189503 A190076 * A189550 A300116 A060056

Adjacent sequences: A278726 A278727 A278728 * A278730 A278731 A278732

Keyword

nonn

Author

R. H. Hardin, Nov 27 2016

Status

approved