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A278622 Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake. 1
16, 357, 4754, 49503, 439446, 3438414, 24103803, 153073965, 888863183, 4758719096, 23665023516, 110046094356, 481337375925, 1990600963219, 7819169497216, 29290369365213, 105007107699726, 361416768054859 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A278627.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 43

FORMULA

Empirical polynomial of degree 43 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A278627.

Sequence in context: A223032 A171680 A208706 * A155122 A094101 A034673

Adjacent sequences:  A278619 A278620 A278621 * A278623 A278624 A278625

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 24 2016

STATUS

approved

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Last modified November 30 10:56 EST 2021. Contains 349419 sequences. (Running on oeis4.)