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A278356 Number of n X n 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake. 0
0, 6, 142, 4872, 366982, 72941420, 41820621848, 72690257629470, 395626151337242078, 6904547033525030005268 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A278363.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

..0..0..1..1. .1..1..1..1. .0..0..1..0. .0..0..0..1. .0..1..1..1

..0..1..1..1. .0..1..1..1. .0..1..1..0. .0..0..1..0. .1..0..0..0

..0..0..0..0. .0..1..1..1. .1..0..1..1. .1..0..1..0. .1..1..0..0

..1..0..0..1. .0..1..1..1. .1..0..1..1. .1..0..1..1. .1..1..0..1

CROSSREFS

Cf. A278363.

Sequence in context: A067196 A286446 A048863 * A277419 A349069 A111839

Adjacent sequences:  A278353 A278354 A278355 * A278357 A278358 A278359

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 19 2016

STATUS

approved

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Last modified July 1 10:54 EDT 2022. Contains 354972 sequences. (Running on oeis4.)