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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.

A002449 Number of different types of binary trees of height n.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 26
5 166
6 1626
7 25510
8 664666
9 29559718
10 2290267226
11 314039061414
12 77160820913242
13 34317392762489766
14 27859502236825957466
15 41575811106337540656038
16 114746581654195790543205466
17 588765612737696531880325270438
18 5642056933026209681424588087899226

List of values

[1, 1, 2, 6, 26, 166, 1626, 25510, 664666, 29559718, 2290267226, 314039061414, 77160820913242, 34317392762489766, 27859502236825957466, 41575811106337540656038, 114746581654195790543205466, 588765612737696531880325270438, 5642056933026209681424588087899226]

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

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