A046909 - OEIS

A046909

Number of isomorphism classes of connected irreducible quasiorders with n labeled points.

1, 1, 1, 1, 2, 17, 167, 1672

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,5

REFERENCES

J. A. Wright, There are 718 6-point topologies, quasi-orderings and transgraphs, Notices Amer. Math. Soc., 17 (1970), p. 646, Abstract #70T-A106.

LINKS

CROSSREFS

KEYWORD

nonn

AUTHOR

John A. Wright.

STATUS

approved