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.

A328121 Number of unrooted level-1 phylogenetic networks (also called galled trees) with (n+1) labeled leaves.

Table of values

n a(n)
1 1
2 2
3 15
4 192
5 3450
6 79740
7 2252880
8 75227040
9 2898481320
10 126570502800
11 6177380517000
12 333231084648000
13 19687828831070400
14 1264341183311606400
15 87691200344603856000
16 6532556443068591936000
17 520205544912884502672000
18 44098092640676115673632000
19 3964782594938523231457584000

List of values

[1, 2, 15, 192, 3450, 79740, 2252880, 75227040, 2898481320, 126570502800, 6177380517000, 333231084648000, 19687828831070400, 1264341183311606400, 87691200344603856000, 6532556443068591936000, 520205544912884502672000, 44098092640676115673632000, 3964782594938523231457584000]

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

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