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.

A178217 Number of unsigned permutations in S_{3n-1} whose breakpoint graph contains only cycles of length 3.

Table of values

n a(n)
1 1
2 12
3 464
4 38720
5 5678400
6 1294720000
7 423809075200
8 188422340198400
9 109244157102080000
10 80068011114291200000
11 72384558633074688000000
12 79125533869852634644480000
13 102879028406438808699535360000
14 156917389218035568246207283200000
15 277479100225377558605912342528000000

List of values

[1, 12, 464, 38720, 5678400, 1294720000, 423809075200, 188422340198400, 109244157102080000, 80068011114291200000, 72384558633074688000000, 79125533869852634644480000, 102879028406438808699535360000, 156917389218035568246207283200000, 277479100225377558605912342528000000]

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

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