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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.

A058518 Number of forests of B-trees of order 3 with n labeled leaves.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 2
5 4
6 6
7 9
8 14
9 21
10 33
11 54
12 89
13 142
14 222
15 350
16 554
17 883
18 1406
19 2225
20 3511
21 5539
22 8768
23 13977
24 22417
25 36143
26 58483
27 94818
28 153716
29 248699
30 401054
31 644485
32 1032794
33 1652377
34 2642421
35 4227547
36 6769660
37 10851491
38 17410292
39 27951747

List of values

[1, 1, 1, 2, 2, 4, 6, 9, 14, 21, 33, 54, 89, 142, 222, 350, 554, 883, 1406, 2225, 3511, 5539, 8768, 13977, 22417, 36143, 58483, 94818, 153716, 248699, 401054, 644485, 1032794, 1652377, 2642421, 4227547, 6769660, 10851491, 17410292, 27951747]

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

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