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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.

A182173 Number of inequivalent expressions involving n operands.

Table of values

n a(n)
1 2
2 10
3 94
4 1466
5 31814
6 887650
7 30259198
8 1218864842
9 56644903958
10 2983300619410
11 175598066553166
12 11423394497044154
13 813897286250604326
14 63030237104398839490
15 5271647928235911880222
16 473558482553909252128298
17 45473767604938843870986422
18 4648336478135316689480390770

List of values

[2, 10, 94, 1466, 31814, 887650, 30259198, 1218864842, 56644903958, 2983300619410, 175598066553166, 11423394497044154, 813897286250604326, 63030237104398839490, 5271647928235911880222, 473558482553909252128298, 45473767604938843870986422, 4648336478135316689480390770]

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

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