A007112 Number of connected unlabeled graphs with n nodes and degree >= 3. (Formerly M3059)

0, 0, 0, 1, 3, 19, 150, 2589, 84242, 5203110, 577076528, 113373005661, 39618075274687, 24916469690421103, 28563628406172313565, 60366734880279992689057, 237406976195431811992516687

Offset

1,5

References

R. W. Robinson, personal communication.

R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1976.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

R. W. Robinson, Table of n, a(n) for n = 1..28

Eric Weisstein's World of Mathematics, Connected Graph

Crossrefs

Row sums of A123545.

Sequence in context: A120590 A354319 A324226 * A007111 A346385 A113013

Adjacent sequences: A007109 A007110 A007111 * A007113 A007114 A007115

Keyword

nonn,nice

Author

N. J. A. Sloane

Status

approved