A018203 Possible numbers of complements of topologies on 12 points.

1, 11, 100, 729, 2047, 4096

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: A288047 A001738 A120655 * A081906 A098296 A037542

Adjacent sequences: A018200 A018201 A018202 * A018204 A018205 A018206

Keyword

nonn,more,changed

Author

N. J. A. Sloane

Status

approved