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.

A122420 Number of labeled directed multigraphs with n arcs and with no vertex of indegree 0.

Table of values

n a(n)
0 1
1 0
2 1
3 10
4 120
5 1778
6 31685
7 661940
8 15882128
9 430607370
10 13022755068
11 434697574538
12 15875944361864
13 629756003982336
14 26963278837704185
15 1239382820431888898
16 60875147436141987437
17 3181961834442383306068

List of values

[1, 0, 1, 10, 120, 1778, 31685, 661940, 15882128, 430607370, 13022755068, 434697574538, 15875944361864, 629756003982336, 26963278837704185, 1239382820431888898, 60875147436141987437, 3181961834442383306068]

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

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