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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.

A197927 The number of isolated nodes in all labeled directed graphs (with self loops allowed) on n nodes.

Table of values

n a(n)
0 0
1 1
2 4
3 48
4 2048
5 327680
6 201326592
7 481036337152
8 4503599627370496
9 166020696663385964544
10 24178516392292583494123520
11 13944156602510523416463735259136
12 31901471898837980949691369446728269824
13 289909687580898100839964337544428699577745408

List of values

[0, 1, 4, 48, 2048, 327680, 201326592, 481036337152, 4503599627370496, 166020696663385964544, 24178516392292583494123520, 13944156602510523416463735259136, 31901471898837980949691369446728269824, 289909687580898100839964337544428699577745408]

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

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