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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.

A014507 Number of digraphs with loops, having unlabeled (non-isolated) nodes and n labeled edges.

Table of values

n a(n)
0 1
1 2
2 13
3 162
4 3075
5 80978
6 2784067
7 119971162
8 6289972169
9 392257225754
10 28582571639293
11 2398695602082442
12 229094801646110203
13 24652935339990534970
14 2963620352166634246995
15 395067805289398293647026
16 58025593661340099613984593
17 9336949406574071339557552946

List of values

[1, 2, 13, 162, 3075, 80978, 2784067, 119971162, 6289972169, 392257225754, 28582571639293, 2398695602082442, 229094801646110203, 24652935339990534970, 2963620352166634246995, 395067805289398293647026, 58025593661340099613984593, 9336949406574071339557552946]

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

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