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A234268 Number of convex topologies on an n-point totally ordered set. 0
1, 4, 21, 129, 876, 6376, 48829, 388771, 3191849, 26864936 (list; graph; refs; listen; history; text; internal format)
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: A099250 A293192 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

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Last modified February 23 11:41 EST 2018. Contains 299579 sequences. (Running on oeis4.)