Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A172565
Number of 3*n X n 0..1 arrays with row sums 7 and column sums 21
1
0, 0, 0, 0, 0, 0, 1, 369398958888960000, 2343976695927269878444049332219968000, 27470008383944006158001488120005460494368265540960000000, 960689698603154580472955204587017348140176811923434228399447157783872000000
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,8
LINKS
R. H. Hardin, Table of n, a(n) for n=1..12
CROSSREFS
Sequence in context: A239923 A104838 A376261 * A360140 A172546 A374949
Adjacent sequences: A172562 A172563 A172564 * A172566 A172567 A172568
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified September 29 00:07 EDT 2024. Contains 376297 sequences.
License Agreements, Terms of Use, Privacy Policy