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A278890 Number of nX2 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes. 1
0, 0, 161, 12392, 389640, 7709668, 112188011, 1300739542, 12621192562, 105953411156, 788164855062, 5289150309598, 32465951875890, 184286234335846, 975907732553934, 4856388450986535, 22846263739979319, 102119704122961051 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A278896.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 60

FORMULA

Empirical polynomial of degree 60 (see link above)

EXAMPLE

Some solutions for n=4

..2..3. .0..2. .3..3. .3..3. .1..3. .3..2. .0..2. .2..3. .0..3. .3..1

..0..3. .1..2. .3..0. .0..2. .2..1. .3..0. .0..0. .3..1. .0..1. .1..3

..0..2. .0..3. .1..3. .0..3. .0..2. .2..0. .0..3. .1..3. .0..0. .0..3

..2..0. .0..1. .0..3. .0..0. .0..0. .0..3. .0..1. .0..0. .0..0. .0..1

CROSSREFS

Cf. A278896.

Sequence in context: A232072 A278205 A197089 * A135699 A092312 A207232

Adjacent sequences:  A278887 A278888 A278889 * A278891 A278892 A278893

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2016

STATUS

approved

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Last modified September 23 12:53 EDT 2020. Contains 337310 sequences. (Running on oeis4.)