login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A278793 Number of nX2 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1
0, 44, 1713, 34348, 468496, 4888659, 41698446, 303361302, 1938464178, 11113364813, 58083296635, 280168918756, 1259424247108, 5317482568472, 21222955187222, 80498197428443, 291472386647409, 1011352733367759 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A278798.

LINKS

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

R. H. Hardin, Empirical polynomial of degree 44

FORMULA

Empirical polynomial of degree 44 (see link above)

EXAMPLE

Some solutions for n=4

..1..3. .1..3. .3..1. .0..3. .1..3. .3..0. .3..2. .0..2. .3..0. .3..2

..2..1. .1..0. .1..1. .2..0. .0..1. .0..3. .1..2. .0..2. .2..0. .2..2

..0..1. .1..2. .0..2. .3..1. .3..0. .3..2. .1..3. .3..0. .3..1. .3..3

..3..0. .3..1. .1..2. .1..0. .3..1. .0..0. .0..1. .1..0. .0..2. .2..0

CROSSREFS

Cf. A278798.

Sequence in context: A004340 A231262 A223049 * A004295 A162882 A163230

Adjacent sequences:  A278790 A278791 A278792 * A278794 A278795 A278796

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 17 01:03 EDT 2019. Contains 328103 sequences. (Running on oeis4.)