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.

A220820 Number of rooted binary leaf-multilabeled trees with n leaves on the label set [3].

Table of values

n a(n)
1 0
2 0
3 3
4 27
5 180
6 1089
7 6333
8 36309
9 207255
10 1184829
11 6799473
12 39224568
13 227554278
14 1327688328
15 7789644996
16 45944320449
17 272329169232
18 1621636729257
19 9697502473014
20 58219671592098
21 350791368690516
22 2120672113779573
23 12859687160772771
24 78201772222916649

List of values

[0, 0, 3, 27, 180, 1089, 6333, 36309, 207255, 1184829, 6799473, 39224568, 227554278, 1327688328, 7789644996, 45944320449, 272329169232, 1621636729257, 9697502473014, 58219671592098, 350791368690516, 2120672113779573, 12859687160772771, 78201772222916649]

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

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