A028853 Number of prime labeled topologies on n points.

4, 29, 320, 6942, 205760, 9535241

Offset

2,1

Links

Table of n, a(n) for n=2..7.

R. Kreminski, Graphs and matrices in the study of (finite) topological spaces, Missouri J. Mathematical Sciences, Volume 12 (Issue #2, Spring 2000).

Crossrefs

Sequence in context: A195194 A215955 A295237 * A118795 A325478 A099700

Adjacent sequences: A028850 A028851 A028852 * A028854 A028855 A028856

Keyword

nonn,more

Author

Richard M Kreminski (kremin(AT)boisdarc.tamu-commerce.edu)

Status

approved