login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A224373 Number of nX7 0..2 arrays with rows unimodal and antidiagonals nondecreasing 1
239, 10511, 227112, 3518302, 48166179, 644368221, 8684742989, 118171436342, 1617034882854, 22180823169132, 304470584215636, 4179566726619035, 57366850907237080, 787294489483452053, 10803851806245324942 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A224374

LINKS

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

FORMULA

Empirical: a(n) = 36*a(n-1) -505*a(n-2) +3667*a(n-3) -15271*a(n-4) +38113*a(n-5) -59621*a(n-6) +53813*a(n-7) -125335*a(n-8) +657330*a(n-9) -1326014*a(n-10) +2644047*a(n-11) +3529521*a(n-12) +7803900*a(n-13) +959690*a(n-14) +28175350*a(n-15) +27269532*a(n-16) +18725976*a(n-17) +1826832*a(n-18) +1263744*a(n-19) for n>24

EXAMPLE

Some solutions for n=3

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

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

..1..1..2..2..2..2..2....1..2..2..2..2..2..1....1..2..1..1..1..1..1

CROSSREFS

Sequence in context: A223932 A224056 A224309 * A278852 A163041 A069364

Adjacent sequences:  A224370 A224371 A224372 * A224374 A224375 A224376

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 05 2013

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 3 17:31 EDT 2022. Contains 355055 sequences. (Running on oeis4.)