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.

A285855 Number of permutations of [n] with four ordered cycles such that equal-sized cycles are ordered with increasing least elements.

Table of values

n a(n)
4 1
5 40
6 430
7 6300
8 62601
9 706608
10 8985560
11 107911760
12 1439518696
13 20364348576
14 304923257184
15 4772610024000
16 80570363703696
17 1409795519233536
18 26263500315144192
19 511153327733815296
20 10464902116976779776
21 223154458395064842240
22 5010190272214829475840

List of values

[1, 40, 430, 6300, 62601, 706608, 8985560, 107911760, 1439518696, 20364348576, 304923257184, 4772610024000, 80570363703696, 1409795519233536, 26263500315144192, 511153327733815296, 10464902116976779776, 223154458395064842240, 5010190272214829475840]

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

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