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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.

A074045 Number of rooted trees of 2n+1 nodes with every leaf at height n.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 6
5 9
6 17
7 28
8 49
9 83
10 145
11 246
12 427
13 729
14 1256
15 2152
16 3702
17 6341
18 10892
19 18662
20 32016
21 54853
22 94034
23 161055
24 275929
25 472461
26 809033
27 1384848
28 2370434
29 4056309
30 6940744
31 11873769
32 20311018
33 34737781
34 59405959
35 101577454
36 173669088
37 296890268

List of values

[1, 1, 2, 3, 6, 9, 17, 28, 49, 83, 145, 246, 427, 729, 1256, 2152, 3702, 6341, 10892, 18662, 32016, 54853, 94034, 161055, 275929, 472461, 809033, 1384848, 2370434, 4056309, 6940744, 11873769, 20311018, 34737781, 59405959, 101577454, 173669088, 296890268]

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

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