A018201 Possible numbers of complements of topologies on 10 points.

1, 9, 64, 256, 343, 511, 1024

Offset

0,2

Links

Table of n, a(n) for n=0..6.

J. I. Brown and S. Watson, The number of complements of a topology on n points is at least 2^n (except for some special cases), Discr. Math., 154 (1996), 27-39.

Crossrefs

Sequence in context: A171671 A016886 A099761 * A181888 A000444 A143631

Adjacent sequences: A018198 A018199 A018200 * A018202 A018203 A018204

Keyword

nonn,fini,more

Author

N. J. A. Sloane

Status

approved