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A278851 Number of nX4 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes. 1
0, 25, 1348, 30772, 449677, 4950399, 44571591, 344302564, 2353207764, 14536481606, 82424606803, 434031398793, 2141802790067, 9975624305928, 44106878749240, 186005545087412, 751100286992318, 2913746151722174 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A278855.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 52

FORMULA

Empirical polynomial of degree 52 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A278855.

Sequence in context: A042200 A104593 A046910 * A243943 A192107 A206465

Adjacent sequences:  A278848 A278849 A278850 * A278852 A278853 A278854

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2016

STATUS

approved

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Last modified June 23 18:45 EDT 2021. Contains 345402 sequences. (Running on oeis4.)