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.

A060313 Number of homeomorphically irreducible rooted trees (also known as series-reduced rooted trees, or rooted trees without nodes of degree 2) on n labeled nodes.

Table of values

n a(n)
1 1
2 2
3 0
4 16
5 25
6 576
7 2989
8 51584
9 512649
10 8927200
11 130956001
12 2533847328
13 48008533885
14 1059817074512
15 24196291364925
16 609350187214336
17 16135860325700881
18 459434230368302016
19 13788624945433889593
20 439102289933675933600
21 14705223056221892676741

List of values

[1, 2, 0, 16, 25, 576, 2989, 51584, 512649, 8927200, 130956001, 2533847328, 48008533885, 1059817074512, 24196291364925, 609350187214336, 16135860325700881, 459434230368302016, 13788624945433889593, 439102289933675933600, 14705223056221892676741]

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

Content is available under The OEIS End-User License Agreement.