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.

A121137 Number of labeled directed multigraphs (without loops) with n arcs and no vertex of degree 0.

Table of values

n a(n)
0 1
1 2
2 27
3 572
4 16787
5 631362
6 28980861
7 1570956872
8 98212870233
9 6956704585554
10 550626446263423
11 48163137319172436
12 4613554511554200251
13 480324019903607680066
14 54004504167811544647161
15 6521368218660772789452944
16 841771274136198763040518633

List of values

[1, 2, 27, 572, 16787, 631362, 28980861, 1570956872, 98212870233, 6956704585554, 550626446263423, 48163137319172436, 4613554511554200251, 480324019903607680066, 54004504167811544647161, 6521368218660772789452944, 841771274136198763040518633]

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

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