A028851 - OEIS

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A028851

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

0

0, 0, 3, 0, 12, 0, 40, 21, 188, 0

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OFFSET

2,3

LINKS

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

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: A211802 A249775 A019264 * A132221 A140093 A194093

Adjacent sequences: A028848 A028849 A028850 * A028852 A028853 A028854

KEYWORD

nonn,more

AUTHOR

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

STATUS

approved