A006404 Number of 2-connected maps without faces of degree 2. (Formerly M1385)

1, 1, 2, 5, 10, 29, 96, 339, 1320, 5473

Offset

3,3

References

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

Walsh, T. R. S.; Generating nonisomorphic maps without storing them. SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.

Links

Table of n, a(n) for n=3..12.

Crossrefs

Sequence in context: A075885 A018377 A056363 * A101957 A047113 A239630

Adjacent sequences: A006401 A006402 A006403 * A006405 A006406 A006407

Keyword

nonn

Author

N. J. A. Sloane.

Extensions

a(11) and a(12) from Sean A. Irvine, Apr 02 2017

Status

approved