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.

A106376 Number of binary trees (each vertex has 0, or 1 left, or 1 right, or 2 children) with n edges and having all leaves at the same level.

Table of values

n a(n)
1 2
2 5
3 10
4 24
5 52
6 121
7 258
8 616
9 1344
10 3128
11 6996
12 16160
13 36248
14 85041
15 191298
16 444168
17 1019328
18 2359392
19 5405488
20 12625336
21 29066304
22 67659824
23 156911364
24 365683744
25 849401072
26 1987046192
27 4624252776
28 10816019328

List of values

[2, 5, 10, 24, 52, 121, 258, 616, 1344, 3128, 6996, 16160, 36248, 85041, 191298, 444168, 1019328, 2359392, 5405488, 12625336, 29066304, 67659824, 156911364, 365683744, 849401072, 1987046192, 4624252776, 10816019328]

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

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