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A278794 Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1
4, 1713, 145208, 7196852, 263134490, 7804657491, 197112382716, 4361870602212, 86190316947578, 1541836669016245, 25236090146159518, 381171321062737412, 5350587072804920340, 70218509804475284134, 865927060368778196406 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A278798.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 173

FORMULA

Empirical polynomial of degree 173 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A278798.

Sequence in context: A280793 A160225 A316484 * A141090 A307580 A255268

Adjacent sequences:  A278791 A278792 A278793 * A278795 A278796 A278797

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2016

STATUS

approved

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Last modified November 24 18:11 EST 2020. Contains 338616 sequences. (Running on oeis4.)