login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A172748 Number of n X n 0..3 arrays with row sums 2*n and column sums 2*n 0

%I

%S 1,3,55,8515,13130451,210668680701,36012988082548233,

%T 68307608848277646753795,1469748355306450464225368161315,

%U 364459290339560650671344361875961740353

%N Number of n X n 0..3 arrays with row sums 2*n and column sums 2*n

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 06 2010

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 June 14 04:39 EDT 2021. Contains 345018 sequences. (Running on oeis4.)