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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.

A227809 Number of rooted identity trees with n nodes and exactly 5 subtrees from the root.

Table of values

n a(n)
15 1
16 6
17 18
18 57
19 165
20 460
21 1242
22 3295
23 8589
24 22169
25 56675
26 143941
27 363527
28 914253
29 2291088
30 5725579
31 14275461
32 35526939
33 88279211
34 219088566
35 543169235
36 1345516437
37 3330785029
38 8240718421
39 20379364252
40 50380569630
41 124513186628
42 307663311638
43 760095010218

List of values

[1, 6, 18, 57, 165, 460, 1242, 3295, 8589, 22169, 56675, 143941, 363527, 914253, 2291088, 5725579, 14275461, 35526939, 88279211, 219088566, 543169235, 1345516437, 3330785029, 8240718421, 20379364252, 50380569630, 124513186628, 307663311638, 760095010218]

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

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