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.

A274056 Number of unrooted labeled trees on 2n nodes with node degree either one or three.

Table of values

n a(n)
1 1
2 4
3 90
4 5040
5 529200
6 89812800
7 22475653200
8 7791559776000
9 3576325937184000
10 2100278686746240000
11 1536353859354874560000
12 1369954918280131223040000
13 1462916144877711556032000000
14 1843274342545916560600320000000
15 2706157144150223750531344800000000

List of values

[1, 4, 90, 5040, 529200, 89812800, 22475653200, 7791559776000, 3576325937184000, 2100278686746240000, 1536353859354874560000, 1369954918280131223040000, 1462916144877711556032000000, 1843274342545916560600320000000, 2706157144150223750531344800000000]

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

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