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A278430 Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake. 1
6, 100, 1609, 19624, 178352, 1287838, 7795151, 41058743, 193149285, 826734193, 3264405727, 12016477160, 41579224479, 136142690453, 424140541353, 1263030700894, 3609095743983, 9929303441355, 26377932553959, 67838309686132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A278435.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 31

FORMULA

Empirical polynomial of degree 31 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A278435.

Sequence in context: A281502 A226413 A226344 * A131311 A098721 A291837

Adjacent sequences:  A278427 A278428 A278429 * A278431 A278432 A278433

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 22 2016

STATUS

approved

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Last modified January 29 11:16 EST 2020. Contains 331337 sequences. (Running on oeis4.)