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.

A227807 Number of rooted identity trees with n nodes and exactly 3 subtrees from the root.

Table of values

n a(n)
7 1
8 2
9 5
10 12
11 28
12 65
13 152
14 351
15 818
16 1907
17 4460
18 10453
19 24581
20 57922
21 136860
22 324088
23 769188
24 1829282
25 4359048
26 10406106
27 24885240
28 59607192
29 142996100
30 343540150
31 826468374
32 1990841497
33 4801534221
34 11593858684
35 28025623617
36 67816875039
37 164268161404

List of values

[1, 2, 5, 12, 28, 65, 152, 351, 818, 1907, 4460, 10453, 24581, 57922, 136860, 324088, 769188, 1829282, 4359048, 10406106, 24885240, 59607192, 142996100, 343540150, 826468374, 1990841497, 4801534221, 11593858684, 28025623617, 67816875039, 164268161404]

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

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