|
Search: id:A006923
|
|
|
| A006923 |
|
Number of trivalent graphs of girth exactly 3 and 2n nodes. (Formerly M2944)
|
|
+0 1
|
|
| 1, 1, 3, 13, 63, 399, 3268, 33496, 412943, 5883727, 94159721, 1661723296
(list; graph; listen)
|
|
|
OFFSET
|
2,3
|
|
|
REFERENCES
|
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
CRC Handbook of Combinatorial Designs, 1996, p. 647.
Gordon Royle, personal communication.
|
|
CROSSREFS
|
Sequence in context: A000259 A007855 A107097 this_sequence A011272 A065065 A020086
Adjacent sequences: A006920 A006921 A006922 this_sequence A006924 A006925 A006926
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
Search completed in 0.002 seconds
|