A234268 Number of convex topologies on an n-point totally ordered set.

1, 4, 21, 129, 876, 6376, 48829, 388771, 3191849, 26864936

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Tyler Clark and Tom Richmond, The Number of Convex Topologies on a Finite Totally Ordered Set, 2013, Involve, Vol. 8 (2015), No. 1, 25-32.

Crossrefs

Cf. A000798, A007052.

Sequence in context: A300674 A371430 A232956 * A111177 A141052 A058308

Adjacent sequences: A234265 A234266 A234267 * A234269 A234270 A234271

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 24 2013

Status

approved