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A278409 Number of nX3 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes. 1
1, 264, 9354, 201539, 3576730, 58069125, 859516239, 11336482734, 132278417831, 1373129978107, 12814886712893, 108729955660224, 847319762234831, 6118517452942163, 41248241307153636, 261266409367793037 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A278414.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 80

FORMULA

Empirical polynomial of degree 80 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A278414.

Sequence in context: A022043 A035315 A288877 * A168196 A264682 A107507

Adjacent sequences: A278406 A278407 A278408 * A278410 A278411 A278412

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 21 2016

STATUS

approved

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Last modified November 28 20:13 EST 2022. Contains 358421 sequences. (Running on oeis4.)