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.

A339987 The number of labeled graphs on 2n vertices that share the same degree sequence as any unrooted binary tree on 2n vertices.

Table of values

n a(n)
1 1
2 4
3 90
4 8400
5 1426950
6 366153480
7 134292027870
8 67095690261600
9 43893900947947050
10 36441011093916429000
11 37446160423265535041100
12 46669357647008722700474400
13 69367722399061403579194432500
14 121238024532751529573125745790000
15 246171692450596203263023527657431250

List of values

[1, 4, 90, 8400, 1426950, 366153480, 134292027870, 67095690261600, 43893900947947050, 36441011093916429000, 37446160423265535041100, 46669357647008722700474400, 69367722399061403579194432500, 121238024532751529573125745790000, 246171692450596203263023527657431250]

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

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