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A046745 Number of connected graphs with <= n edges. 0
1, 2, 5, 10, 22, 52, 131, 358, 1068, 3390, 11461, 40964, 153786, 603927, 2471798, 10509270, 46296937, 210848414, 990794383, 4795761825, 23875074600, 122086530809, 640484152252, 3443478138871 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

G. A. Baker et al., High-temperature expansions for the spin-1/2 Heisenberg model, Phys. Rev., 164 (1967), 800-817.

LINKS

Table of n, a(n) for n=1..24.

CROSSREFS

Partial sums of A002905.

Sequence in context: A232163 A166300 A038149 * A198950 A226455 A068054

Adjacent sequences:  A046742 A046743 A046744 * A046746 A046747 A046748

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Vladeta Jovovic, Apr 10 2001

More terms from Vladeta Jovovic, Jul 05 2003

STATUS

approved

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Last modified September 20 06:01 EDT 2014. Contains 246988 sequences.