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!)
A172662 Number of 2*n X n 0..2 arrays with row sums n and column sums 2*n. 2

%I #6 Oct 15 2023 18:55:22

%S 1,19,5881,115321795,101471705778601,5520471267708881730181,

%T 17949532724881770551236183389177,

%U 3781994369388530584295658367829503216546371

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

%H R. H. Hardin, <a href="/A172662/b172662.txt">Table of n, a(n) for n=1..10</a>

%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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 22 21:06 EDT 2024. Contains 371906 sequences. (Running on oeis4.)