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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
OFFSET
1,1
COMMENTS
Column 3 of A278798.
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: A160225 A377601 A316484 * A141090 A307580 A255268
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 28 2016
STATUS
approved