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A278776 Number of nX6 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1
21, 1750, 48501, 955347, 16205001, 251740932, 3634987413, 48847405083, 611199661843, 7140933364136, 78280456105686, 809842005695656, 7953581118077240, 74557744904209329, 670158115881138987 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A278778.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..153

R. H. Hardin, Empirical polynomial of degree 134

FORMULA

Empirical polynomial of degree 134 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A278778.

Sequence in context: A221033 A221497 A155740 * A296597 A203327 A297652

Adjacent sequences:  A278773 A278774 A278775 * A278777 A278778 A278779

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2016

STATUS

approved

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Last modified May 19 04:20 EDT 2022. Contains 353826 sequences. (Running on oeis4.)