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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.

A220825 Number of rooted gene trees with n leaves on the label set [5].

Table of values

n a(n)
1 5
2 15
3 110
4 965
5 9376
6 97775
7 1068450
8 12081605
9 140160650
10 1658936806
11 19953117520
12 243173225615
13 2996409047690
14 37268293795255
15 467259511562294
16 5899263870621530
17 74934997567372640
18 956996551484947905
19 12280538887616448930
20 158266409616840974927

List of values

[5, 15, 110, 965, 9376, 97775, 1068450, 12081605, 140160650, 1658936806, 19953117520, 243173225615, 2996409047690, 37268293795255, 467259511562294, 5899263870621530, 74934997567372640, 956996551484947905, 12280538887616448930, 158266409616840974927]

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

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