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A278629 Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1
1, 285, 10824, 234484, 3739008, 48592635, 541463431, 5325263364, 47098291840, 379621129293, 2817194942225, 19407777240447, 124964309624036, 756392815286668, 4325156175914066, 23464134450391209, 121221027131246039 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A278634.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 70

FORMULA

Empirical polynomial of degree 70 (see link above)

EXAMPLE

Some solutions for n=3

..1..2..1. .2..0..2. .1..0..2. .2..0..1. .2..0..0. .2..2..1. .0..1..0

..0..0..0. .0..2..0. .0..0..1. .0..2..1. .2..1..2. .2..1..2. .2..2..2

..1..1..0. .2..2..2. .1..0..1. .1..0..2. .2..0..0. .1..2..1. .1..0..0

CROSSREFS

Cf. A278634.

Sequence in context: A209311 A176712 A225881 * A241970 A231422 A146893

Adjacent sequences:  A278626 A278627 A278628 * A278630 A278631 A278632

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 24 2016

STATUS

approved

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Last modified September 20 08:08 EDT 2019. Contains 327214 sequences. (Running on oeis4.)