A007268 Number of partition graphs on n vertices. (Formerly M1467)

1, 0, 1, 2, 5, 14, 47, 186, 894, 5249, 38181, 348568

Offset

1,4

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=1..12.

D. W. DeTemple et al., Recent examples in the theory of partition graphs, Discrete Math., 113 (1993), 255-258.

Crossrefs

Sequence in context: A327702 A317784 A096402 * A326898 A109156 A143918

Adjacent sequences: A007265 A007266 A007267 * A007269 A007270 A007271

Keyword

nonn,more,hard

Author

Simon Plouffe

Extensions

a(11)-a(12) from Sean A. Irvine, Dec 04 2017

Status

approved