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.

A001174 Number of oriented graphs (i.e., digraphs with no bidirected edges) on n unlabeled nodes. Also number of complete digraphs on n unlabeled nodes. Number of antisymmetric relations (i.e., oriented graphs with loops) on n unlabeled nodes is A083670.

Table of values

n a(n)
1 1
2 2
3 7
4 42
5 582
6 21480
7 2142288
8 575016219
9 415939243032
10 816007449011040
11 4374406209970747314
12 64539836938720749739356
13 2637796735571225009053373136
14 300365896158980530053498490893399

List of values

[1, 2, 7, 42, 582, 21480, 2142288, 575016219, 415939243032, 816007449011040, 4374406209970747314, 64539836938720749739356, 2637796735571225009053373136, 300365896158980530053498490893399]

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

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