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.

A303025 Number of series-reduced anti-binary (no unary or binary branchings) unlabeled rooted trees with n nodes.

Table of values

n a(n)
1 1
2 0
3 0
4 1
5 1
6 1
7 2
8 3
9 4
10 7
11 11
12 17
13 28
14 46
15 74
16 123
17 205
18 341
19 571
20 964
21 1629
22 2764
23 4707
24 8040
25 13766
26 23639
27 40681
28 70163
29 121256
30 209960
31 364168
32 632694
33 1100906
34 1918375
35 3347346
36 5848271
37 10229977
38 17915018
39 31407088
40 55116661
41 96818589
42 170229939

List of values

[1, 0, 0, 1, 1, 1, 2, 3, 4, 7, 11, 17, 28, 46, 74, 123, 205, 341, 571, 964, 1629, 2764, 4707, 8040, 13766, 23639, 40681, 70163, 121256, 209960, 364168, 632694, 1100906, 1918375, 3347346, 5848271, 10229977, 17915018, 31407088, 55116661, 96818589, 170229939]

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

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