A006291 Pseudo-bricks with n nodes. (Formerly M4450)

1, 7, 88, 1731, 55094, 2806539

Offset

4,2

References

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

Links

Table of n, a(n) for n=4..9.

T. R. S. Walsh, Counting unlabeled three-connected and homeomorphically irreducible two-connected graphs, J. Combin. Theory Ser. B 32 (1982), no. 1, 12-32.

Index entries for sequences related to bricks

Crossrefs

Cf. A006292, A006293.

Sequence in context: A137143 A069430 A020564 * A220193 A220357 A054678

Adjacent sequences: A006288 A006289 A006290 * A006292 A006293 A006294

Keyword

nonn,more

Author

N. J. A. Sloane.

Status

approved