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.

A000151 Number of oriented rooted trees with n nodes. Also rooted trees with n nodes and 2-colored non-root nodes.

Table of values

n a(n)
1 1
2 2
3 7
4 26
5 107
6 458
7 2058
8 9498
9 44947
10 216598
11 1059952
12 5251806
13 26297238
14 132856766
15 676398395
16 3466799104
17 17873508798
18 92630098886
19 482292684506
20 2521610175006
21 13233573019372
22 69687684810980
23 368114512431638
24 1950037285256658
25 10357028326495097
26 55140508518522726
27 294219119815868952
28 1573132563600386854
29 8427354035116949486
30 45226421721391554194

List of values

[1, 2, 7, 26, 107, 458, 2058, 9498, 44947, 216598, 1059952, 5251806, 26297238, 132856766, 676398395, 3466799104, 17873508798, 92630098886, 482292684506, 2521610175006, 13233573019372, 69687684810980, 368114512431638, 1950037285256658, 10357028326495097, 55140508518522726, 294219119815868952, 1573132563600386854, 8427354035116949486, 45226421721391554194]

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

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