cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-4 of 4 results.

A253950 Number of finite, negative, totally ordered monoids of size n (semigroups with a neutral element that is also the top element).

Original entry on oeis.org

1, 1, 2, 8, 44, 308, 2641, 27120, 332507, 5035455
Offset: 1

Views

Author

Milan Petrík, Jan 20 2015

Keywords

Comments

The terms have been computed using the algorithm described in the referenced papers.

Crossrefs

Extensions

a(10) from Milan Petrík, May 09 2021

A253948 Number of finite, negative, Archimedean, commutative, totally ordered monoids of size n (semi-groups with a neutral element that is also the top element).

Original entry on oeis.org

1, 1, 1, 2, 6, 22, 95, 471, 2670, 17387, 131753, 1184059, 12896589
Offset: 1

Views

Author

Milan Petrík, Jan 20 2015

Keywords

Comments

Also number of Archimedean triangular norms on an n-chain.
The terms have been computed using the algorithm described in the referenced papers.

Crossrefs

Extensions

a(13) from Milan Petrík, May 09 2021

A253949 Number of finite, negative, Archimedean, totally ordered monoids of size n (semi-groups with a neutral element that is also the top element).

Original entry on oeis.org

1, 1, 1, 2, 8, 44, 333, 3543, 54954, 1297705, 47542371
Offset: 1

Views

Author

Milan Petrík, Jan 20 2015

Keywords

Comments

The terms have been computed using the algorithm described in the referenced papers.

Crossrefs

Extensions

a(11) from Milan Petrík, May 09 2021

A034786 Number of linearly ordered Girard monoids of size n; number of t-norms on an n-chain inducing an involutive residual negator.

Original entry on oeis.org

1, 1, 1, 2, 3, 7, 12, 31, 59, 161, 329, 944, 2067, 6148, 14558, 44483, 116372
Offset: 1

Views

Author

Bernard De Baets (Bernard.DeBaets(AT)rug.ac.be), Mike Nachtegael (mike.nachtegael(AT)rug.ac.be)

Keywords

References

  • M. Nachtegael, The Dizzy Number of Fuzzy Implication Operators on Finite Chains, in "Fuzzy Logic and Intelligent Technologies for Nuclear Science and Industry", ed. Ruan D., Abderrahim H., D'hondt P., Kerre E., 1998, pp. 29-35.

Crossrefs

Cf. A030453.
Showing 1-4 of 4 results.