A018202 Possible numbers of complements of topologies on 11 points.

1, 10, 81, 512, 1023, 2048

Offset

0,2

Links

Table of n, a(n) for n=0..5.

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: A010569 A136870 A293367 * A154236 A095004 A037541

Adjacent sequences: A018199 A018200 A018201 * A018203 A018204 A018205

Keyword

nonn,more

Author

N. J. A. Sloane

Status

approved