Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A139675
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A139675 Number of n X n symmetric binary matrices with all row sums 8. +0
1
1, 2620, 8372754, 30649435140, 133475706272700 (list; graph; listen)
OFFSET

8,2
CROSSREFS

Sequence in context: A015309 A054258 A066871 this_sequence A020439 A002482 A107532

Adjacent sequences: A139672 A139673 A139674 this_sequence A139676 A139677 A139678

KEYWORD

nonn

AUTHOR

Ron Hardin (rhh(AT)cadence.com), Jun 12 2008

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

AT&T Labs Research

Legal Notice
© 2007 AT&T Knowledge Ventures. All Rights Reserved.