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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.

A004140 Number of nonempty labeled simple graphs on nodes chosen from an n-set.

Table of values

n a(n)
0 0
1 1
2 4
3 17
4 112
5 1449
6 40068
7 2350601
8 286192512
9 71213783665
10 35883905263780
11 36419649682706465
12 74221659280476136240
13 303193505953871645562969
14 2480118046704094643352358500
15 40601989176407026666590990422105
16 1329877330167226219547875498464516480

List of values

[0, 1, 4, 17, 112, 1449, 40068, 2350601, 286192512, 71213783665, 35883905263780, 36419649682706465, 74221659280476136240, 303193505953871645562969, 2480118046704094643352358500, 40601989176407026666590990422105, 1329877330167226219547875498464516480]

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

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