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!)
A067215 Number of n X n 0..7 matrices with all row and column sums equal. 2

%I

%S 1,8,64,10088,82112704,32701809796548,664942846307414508064,

%T 717494365786942428294915062416

%N Number of n X n 0..7 matrices with all row and column sums equal.

%e Some solutions for n=3

%e ..5..6..2....6..7..4....6..0..4....5..2..1....3..2..5....2..1..5....4..7..5

%e ..3..4..6....6..4..7....0..4..6....3..4..1....4..1..5....5..2..1....7..2..7

%e ..5..3..5....5..6..6....4..6..0....0..2..6....3..7..0....1..5..2....5..7..4

%Y Column 7 of A202784.

%K nonn

%O 0,2

%A _R. H. Hardin_, Feb 20 2002

%E a(0)=1 prepended and a(6)-a(7) from _Andrew Howroyd_, May 11 2020

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 August 7 20:35 EDT 2022. Contains 355994 sequences. (Running on oeis4.)