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: Rémy-Robert Joseph

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Rémy-Robert Joseph has authored 1 sequences.

A219116 Number of semicomplete digraphs on n nodes with an "Emperor".

Original entry on oeis.org

0, 1, 2, 9, 108, 3645, 354294, 100442349, 83682825624, 205891132094649, 1500946352969991210, 32497439772059170685073, 2093390532109442148854046084, 401741006974223960704968343445877, 229924845755649214047240549209929574046
Offset: 0

Author

Rémy-Robert Joseph, Nov 12 2012

Keywords

Comments

a(n) is also the number of asymmetric digraphs on n nodes with an "Emperor".

Crossrefs

See also A123903 for tournaments and A217652 for digraphs.

Programs

Formula

a(n) = n*3^((n^2 - 3*n + 2)/2).