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

 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

%I

%S 2,3,8,4,52,126,5,184,8460,10016,6,480,143028,14394092,3648810,7,1040,

%T 1217196,1960824272,231197740500,5616280768,8,1988,6835050,

%U 82673548892,443471777729100

%N 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.

%C Table starts

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

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

%C 126, 8460, 143028, 1217196, 6835050, ...

%C 10016, 14394092, 1960824272, 82673548892, ...

%C 3648810, 231197740500, 443471777729100, ...

%C 5616280768, ...

%e Some solutions for n=3, k=3:

%e 2 0 3 2 0 1 0 0 3 0 1 3 0 0 3 1 2 1 2 0 3

%e 1 0 0 0 1 3 3 0 2 1 2 3 0 3 2 0 2 3 2 0 0

%e 3 1 0 2 0 0 0 0 1 0 1 3 2 1 0 0 2 1 0 1 3

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

%Y Column 3 is A202631.

%K nonn,tabl,more

%O 1,1

%A _R. H. Hardin_, Dec 22 2011

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.

Last modified August 9 18:55 EDT 2022. Contains 356026 sequences. (Running on oeis4.)