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A030453 Number of linearly ordered Abelian monoids of size n (semi-groups with greatest element of the corresponding chain as neutral element); triangular norms on an n-chain. 4
1, 1, 2, 6, 22, 94, 451, 2386, 13775, 86417, 590489, 4446029, 37869449, 382549464 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

R. Belohlavek, V. Vychodil, Residual lattices of size <=12, Order 27 (2010) 147-161 doi:10.1007/s11083-010-9143-7, Table 2

LINKS

Table of n, a(n) for n=1..14.

Bernard de Baets, Home page

Index entries for sequences related to monoids

CROSSREFS

Sequence in context: A150274 A109317 A109153 * A001861 A049526 A187251

Adjacent sequences:  A030450 A030451 A030452 * A030454 A030455 A030456

KEYWORD

nonn,hard,nice

AUTHOR

Bernard De Baets (Bernard.DeBaets(AT)rug.ac.be)

STATUS

approved

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Last modified April 19 01:29 EDT 2019. Contains 322237 sequences. (Running on oeis4.)