A234268 - OEIS

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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: 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