cp's OEIS Frontend

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.

A319580 Number of binary rooted trees with n leaves of n colors and all non-leaf nodes having out-degree 2.

Table of values

n a(n)
1 1
2 3
3 18
4 215
5 3600
6 80136
7 2213036
8 73068543
9 2806959015
10 123002168300
11 6055381161852
12 330885794632536
13 19872950226273053
14 1301261803764756855
15 92259974680854975000
16 7041606755629152575055
17 575638367425376279620662
18 50180725346542105445190603

List of values

[1, 3, 18, 215, 3600, 80136, 2213036, 73068543, 2806959015, 123002168300, 6055381161852, 330885794632536, 19872950226273053, 1301261803764756855, 92259974680854975000, 7041606755629152575055, 575638367425376279620662, 50180725346542105445190603]

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

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