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.

User: Boyang Su

Boyang Su's wiki page.

Boyang Su has authored 2 sequences.

A289849 Cardinality of the maximal set of ordered factor pairs such that a Quasi-Factor Pair Latin Square of order n exists.

Original entry on oeis.org

1, 2, 2, 3, 2, 4, 2, 4, 3, 4, 2, 5, 2, 4, 4, 5, 2, 6, 2, 5, 4, 4, 2, 6, 3, 4, 4, 5, 2
Offset: 1

Views

Author

Leah S. Miller, Jordan Lenchitz, Makkah Davis, Bob Kuo, Boyang Su, James Hammer, Jul 13 2017

Keywords

Comments

For n a prime power or twice a prime, a(n) is known to coincide with A000005(n).

Links

Crossrefs

Cf. A000005.

A289812 n for which a Factor Pair Latin Square of order n exists.

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32
Offset: 1

Views

Author

Jordan Lenchitz, Leah S. Miller, Makkah Davis, Bob Kuo, Boyang Su, James Hammer, Jul 12 2017

Keywords

Comments

This sequences differs from A206551 because no Factor Pair Latin Square of order 45 exists.
It is known that every prime power (A000961) as well as twice every prime number (A100484) appears in this sequence.

Links

Crossrefs

Cf. A000961, A100484, A206551.

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

Content is available under The OEIS End-User License Agreement.