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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.

A185650 a(n) is the number of rooted trees with 2n vertices n of whom are leaves.

Table of values

n a(n)
1 1
2 2
3 8
4 39
5 214
6 1268
7 7949
8 51901
9 349703
10 2415348
11 17020341
12 121939535
13 885841162
14 6511874216
15 48359860685
16 362343773669
17 2736184763500
18 20805175635077
19 159174733727167
20 1224557214545788
21 9467861087020239
22 73534456468877012
23 573484090227222260

List of values

[1, 2, 8, 39, 214, 1268, 7949, 51901, 349703, 2415348, 17020341, 121939535, 885841162, 6511874216, 48359860685, 362343773669, 2736184763500, 20805175635077, 159174733727167, 1224557214545788, 9467861087020239, 73534456468877012, 573484090227222260]

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

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