A018199 Possible numbers of complements of topologies on 8 points.

1, 7, 36, 64, 125, 127, 243, 256

Offset

0,2

Links

Table of n, a(n) for n=0..7.

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: A028389 A041603 A176543 * A063168 A163683 A103090

Adjacent sequences: A018196 A018197 A018198 * A018200 A018201 A018202

Keyword

nonn,more

Author

N. J. A. Sloane

Status

approved