login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139673 Number of n X n symmetric binary matrices with all row sums 6. 1
1, 232, 66178, 24243520, 11234051976, 6549149852112, 4762109992158288 (list; graph; refs; listen; history; internal format)
OFFSET

6,2

CROSSREFS

Sequence in context: A206963 A206573 A125850 * A151629 A132917 A139652

Adjacent sequences:  A139670 A139671 A139672 * A139674 A139675 A139676

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net), Jun 12 2008

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 11:36 EST 2012. Contains 205623 sequences.