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!)
A202651 Table read by downward antidiagonals: T(n,k) is the number of n X n 0..k arrays with no row or column sum equal to the previous one. 4
2, 3, 8, 4, 52, 126, 5, 184, 8460, 10016, 6, 480, 143028, 14394092, 3648810, 7, 1040, 1217196, 1960824272, 231197740500, 5616280768, 8, 1988, 6835050, 82673548892, 443471777729100 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

           2.            3,               4,           5,       6,    7, 8, ...

           8,           52,             184,         480,    1040, 1988, ...

         126,         8460,          143028,     1217196, 6835050, ...

       10016,     14394092,      1960824272, 82673548892, ...

     3648810, 231197740500, 443471777729100, ...

  5616280768, ...

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

Some solutions for n=3, k=3:

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

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

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

CROSSREFS

Rows n=2..4: A035288, A202652, A202653.

Column 3 is A202631.

Sequence in context: A194931 A195248 A229870 * A334859 A084110 A299788

Adjacent sequences:  A202648 A202649 A202650 * A202652 A202653 A202654

KEYWORD

nonn,tabl,more

AUTHOR

R. H. Hardin, Dec 22 2011

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 5 15:05 EDT 2022. Contains 355099 sequences. (Running on oeis4.)