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A278652 Number of nX4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes. 1
0, 1076, 210616, 20667190, 1386399220, 71471902148, 3014441325194, 108332967120296, 3414333388975884, 96390462710001643, 2476398000574388212, 58596033969288185394, 1288713602013678461961, 26531650462405865691808 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A278656.

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A278656.

Sequence in context: A237213 A235959 A235570 * A235084 A274234 A023085

Adjacent sequences:  A278649 A278650 A278651 * A278653 A278654 A278655

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 25 2016

STATUS

approved

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Last modified October 28 16:41 EDT 2021. Contains 348329 sequences. (Running on oeis4.)