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.

A286077 Number of permutations of [n] with a strongly unimodal cycle size list.

Table of values

n a(n)
0 1
1 1
2 1
3 5
4 16
5 80
6 468
7 3220
8 24436
9 218032
10 2114244
11 22759788
12 267150264
13 3413938512
14 46668380592
15 690881123856
16 10841100147072
17 181434400544160
18 3215124610986240
19 60280035304993920
20 1186176116251848960
21 24624604679704053120
22 534223121657911528320

List of values

[1, 1, 1, 5, 16, 80, 468, 3220, 24436, 218032, 2114244, 22759788, 267150264, 3413938512, 46668380592, 690881123856, 10841100147072, 181434400544160, 3215124610986240, 60280035304993920, 1186176116251848960, 24624604679704053120, 534223121657911528320]

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

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