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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.

A120803 Number of series-reduced balanced trees with n leaves.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 4
7 4
8 8
9 9
10 16
11 20
12 37
13 47
14 80
15 111
16 183
17 256
18 413
19 591
20 940
21 1373
22 2159
23 3214
24 5067
25 7649
26 12054
27 18488
28 29203
29 45237
30 71566
31 111658
32 176710
33 276870
34 437820
35 687354
36 1085577
37 1705080
38 2688285
39 4221333
40 6644088
41 10425748

List of values

[1, 1, 1, 2, 2, 4, 4, 8, 9, 16, 20, 37, 47, 80, 111, 183, 256, 413, 591, 940, 1373, 2159, 3214, 5067, 7649, 12054, 18488, 29203, 45237, 71566, 111658, 176710, 276870, 437820, 687354, 1085577, 1705080, 2688285, 4221333, 6644088, 10425748]

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

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