OFFSET
1,2
COMMENTS
For K4 the sequence is 1, 2, 2, 4, 6.
LINKS
Eric Weisstein. "Complete Graph."
EXAMPLE
a(5) = 48 because there are 48 paths of length 5 between two arbitrary, distinct vertices in K5.
CROSSREFS
KEYWORD
easy,fini,full,nonn
AUTHOR
Ryan Propper, Jun 06 2005
STATUS
approved