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!)
A159406 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 20 1

%I

%S 46,91930,140711904,225806690703,250593181727052,179001707241146535,

%T 75883146328596287296,18277998911418077944389,

%U 2521047787492275773799084,210383258780959085774161729,11422723249364268387819064596

%N Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 20

%H R. H. Hardin, <a href="/A159406/b159406.txt">Table of n, a(n) for n=3..18</a>

%K nonn

%O 3,1

%A _R. H. Hardin_ Apr 11 2009

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 January 16 05:22 EST 2022. Contains 350374 sequences. (Running on oeis4.)