A028852 Number of composite unlabeled connected T_0 topologies (i.e., composite T_0 connected homeomorphism classes) on n points.

0, 0, 1, 0, 3, 0, 10, 6, 44, 0

Offset

2,5

References

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

Links

Table of n, a(n) for n=2..11.

Missouri J. Mathematical Sciences (New web address)

Crossrefs

Sequence in context: A293939 A342926 A119957 * A319202 A327072 A327377

Adjacent sequences: A028849 A028850 A028851 * A028853 A028854 A028855

Keyword

nonn

Author

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

Status

approved