A014397 Number of loopless multigraphs with 7 nodes and n edges.

1, 1, 3, 8, 22, 60, 173, 471, 1303, 3510, 9234, 23574, 58464, 140340, 326792, 738090, 1619321, 3455129, 7180856, 14555856, 28819926, 55808840, 105834657, 196779279, 359124362, 643976482, 1135731758, 1971734302, 3372477533

Offset

0,3

References

CRC Handbook of Combinatorial Designs, 1996, p. 650.

F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 1973, p. 88, (4.1.18).

Links

Andrew Howroyd, Table of n, a(n) for n = 0..1000

Prog

(PARI) concat([1], G(7, 30)) \\ See A191646 for G. - Andrew Howroyd, Mar 15 2020

Crossrefs

Row 7 of A192517.

Cf. A001399, A003082, A014395, A014396, A014398.

Sequence in context: A318822 A318863 A318821 * A048503 A318862 A318820

Adjacent sequences: A014394 A014395 A014396 * A014398 A014399 A014400

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms and better description from Vladeta Jovovic, Dec 29 1999

Status

approved