|
| |
|
|
A046751
|
|
Triangle of number of connected graphs with n nodes and k edges (n >= 2, 1 <= k <= n(n-1)/2).
|
|
5
| |
|
|
1, 0, 1, 1, 0, 0, 2, 2, 1, 1, 0, 0, 0, 3, 5, 5, 4, 2, 1, 1, 0, 0, 0, 0, 6, 13, 19, 22, 20, 14, 9, 5, 2, 1, 1, 0, 0, 0, 0, 0, 11, 33, 67, 107, 132, 138, 126, 95, 64, 40, 21, 10, 5, 2, 1, 1, 0, 0, 0, 0, 0, 0, 23, 89, 236, 486, 814, 1169, 1454, 1579, 1515, 1290, 970, 658, 400, 220, 114
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 2,7
|
|
|
REFERENCES
| G. A. Baker et al., High-temperature expansions for the spin-1/2 Heisenberg model, Phys. Rev., 164 (1967), 800-817.
|
|
|
LINKS
| Gordon Royle, Small graphs
|
|
|
EXAMPLE
| 1; 0,1,1; 0,0,2,2,1,1; 0,0,0,3,5,5,4,2,1,1 [ the last batch giving the numbers of connected graphs with 4 nodes and from 1 to 10 edges ].
|
|
|
CROSSREFS
| See A054924, which is the main entry for this triangle.
Cf. A002905, A008406, A046742, A054923, A054924.
Sequence in context: A049334 A054924 A025485 * A124478 A030353 A089617
Adjacent sequences: A046748 A046749 A046750 * A046752 A046753 A046754
|
|
|
KEYWORD
| nonn,easy,nice,tabf
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
EXTENSIONS
| More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 21 2000
|
| |
|
|
