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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.

A377461 Number of ranked labeled trees compatible with the 2-leaf perfect phylogeny of sample size n that possesses the largest number of compatible ranked labeled trees.

Table of values

n a(n)
2 1
3 1
4 2
5 9
6 54
7 540
8 6480
9 113400
10 2268000
11 61236000
12 1837080000
13 70727580000
14 2970558360000
15 154469034720000
16 8650265944320000
17 583892951241600000
18 42040292489395200000
19 3573424861598592000000
20 321608237543873280000000
21 33608060823334757760000000

List of values

[1, 1, 2, 9, 54, 540, 6480, 113400, 2268000, 61236000, 1837080000, 70727580000, 2970558360000, 154469034720000, 8650265944320000, 583892951241600000, 42040292489395200000, 3573424861598592000000, 321608237543873280000000, 33608060823334757760000000]

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

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