|
|
A007170
|
|
Number of Q-graphs with 2n edges.
(Formerly M1877)
|
|
1
|
|
|
0, 1, 2, 8, 48, 328, 2335, 17133, 128262, 975547, 7518282, 58582564, 460769228, 3653385453, 29170737927, 234350263419, 1892956305974, 15364355580327, 125247311808502, 1024983176867450, 8417817643684208, 69355110426227296
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
REFERENCES
|
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
|
|
LINKS
|
|
|
FORMULA
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|