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 1-3 of 3 results.

A058104 Number of asymmetric semigroups of order n.

Original entry on oeis.org

1, 1, 3, 15, 112, 1221, 19684, 1458882, 3667253972, 105923135799007
Offset: 0

Views

Author

Christian G. Bower, Nov 09 2000

Keywords

Links

Crossrefs

Cf. A027851, A058113, A079175.

Formula

a(n) = A079175(n, A027423(n)).

Extensions

Updated Feb 19 2001
a(8)-a(9) added from the Distler-Kelsey reference by Andrew Howroyd, Jan 26 2022

A058115 Number of asymmetric idempotent semigroups of order n.

Original entry on oeis.org

1, 1, 1, 3, 12, 68, 502, 4158
Offset: 0

Views

Author

Christian G. Bower, Nov 09 2000

Keywords

Links

Crossrefs

Main diagonal of A058113.

Extensions

Updated Feb 19 2001

A058114 Number of asymmetric semigroups of order n with 1 idempotent.

Original entry on oeis.org

1, 2, 3, 11, 112, 4398, 1181185
Offset: 1

Views

Author

Christian G. Bower, Nov 09 2000

Keywords

Links

Crossrefs

Column 1 of A058113.

Extensions

Updated Feb 19 2001
Showing 1-3 of 3 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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