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.

A037026 Number of B-trees of order 4 with n leaves.

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 2
5 2
6 4
7 5
8 9
9 15
10 28
11 45
12 73
13 116
14 199
15 345
16 601
17 1021
18 1738
19 2987
20 5244
21 9321
22 16720
23 30103
24 54345
25 97996
26 176011
27 314045
28 556577
29 980852
30 1722451
31 3020214
32 5298570
33 9316456
34 16440262
35 29136489
36 51860214
37 92643425
38 165934156

List of values

[0, 1, 1, 1, 2, 2, 4, 5, 9, 15, 28, 45, 73, 116, 199, 345, 601, 1021, 1738, 2987, 5244, 9321, 16720, 30103, 54345, 97996, 176011, 314045, 556577, 980852, 1722451, 3020214, 5298570, 9316456, 16440262, 29136489, 51860214, 92643425, 165934156]