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.

A368178 Number of ordered trees with n+1 leaves, no node of outdegree 1, and having as many leaves marked as the number of nodes of outdegree greater than 1.

Table of values

n a(n)
0 1
1 2
2 9
3 54
4 375
5 2848
6 22981
7 193742
8 1688427
9 15101778
10 137930199
11 1281629088
12 12081441411
13 115288530516
14 1111783691037
15 10819906562622
16 106147110898419
17 1048748721598078
18 10427413491373843
19 104265186535823798
20 1047894080773661481

List of values

[1, 2, 9, 54, 375, 2848, 22981, 193742, 1688427, 15101778, 137930199, 1281629088, 12081441411, 115288530516, 1111783691037, 10819906562622, 106147110898419, 1048748721598078, 10427413491373843, 104265186535823798, 1047894080773661481]

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

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