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A293501 Number of unlabeled semiorders on n points and having dimension 3 0
3, 40, 318, 1974, 10603, 51894, 238413, 1047440, 4454826, 18496217, 75416600, 303287250, 1206781482, 4762466651, 18674965709, 72866587238, 283217927396, 1097537249485, 4243554109115, 16379413110981, 63142882465324, 243203630272390 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,1

LINKS

Table of n, a(n) for n=7..28.

Mitchel T. Keller, Stephen J. Young, Hereditary Semiorders and Enumeration of Semiorders by Dimension, arXiv:1801.00501 [math.CO], 2018.

FORMULA

a(n) = A000108(n) - A293498(n).

CROSSREFS

Cf. A000108, A293498.

Sequence in context: A181395 A165395 A165386 * A002700 A220639 A337692

Adjacent sequences:  A293498 A293499 A293500 * A293502 A293503 A293504

KEYWORD

nonn

AUTHOR

Mitchel T. Keller, Oct 10 2017

STATUS

approved

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Last modified May 22 14:11 EDT 2022. Contains 353951 sequences. (Running on oeis4.)