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!)
A156446 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 8. 0

%I #4 Dec 18 2015 18:17:16

%S 1,2,10,18,308,1716,83987,644220,42440517,448032730,40142592042,

%T 617153224314,75157230205402,1794934830265052,303255697073306250

%N Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 8.

%K nonn

%O 2,2

%A _R. H. Hardin_ Feb 09 2009

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 June 2 21:57 EDT 2023. Contains 363101 sequences. (Running on oeis4.)