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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.

A298118 Number of unlabeled rooted trees with n nodes in which all positive outdegrees are odd.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 3
6 6
7 11
8 21
9 40
10 80
11 159
12 322
13 657
14 1356
15 2816
16 5896
17 12407
18 26267
19 55861
20 119331
21 255878
22 550665
23 1188786
24 2574006
25 5588177
26 12162141
27 26529873
28 57993624
29 127020653
30 278716336
31 612617523
32 1348680531
33 2973564157
34 6565313455
35 14514675376

List of values

[1, 1, 1, 2, 3, 6, 11, 21, 40, 80, 159, 322, 657, 1356, 2816, 5896, 12407, 26267, 55861, 119331, 255878, 550665, 1188786, 2574006, 5588177, 12162141, 26529873, 57993624, 127020653, 278716336, 612617523, 1348680531, 2973564157, 6565313455, 14514675376]

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

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