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.

A276839 Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most five elements.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 360
7 1050
8 3192
9 10305
10 35505
11 116620
12 374172
13 1195764
14 3848248
15 12538476
16 40807108
17 132283092
18 427799593
19 1383464353
20 4481902342
21 14529001194
22 47085299068
23 152520137944
24 493941015012
25 1599895591174
26 5182983937428
27 16791233651977

List of values

[1, 1, 2, 6, 24, 120, 360, 1050, 3192, 10305, 35505, 116620, 374172, 1195764, 3848248, 12538476, 40807108, 132283092, 427799593, 1383464353, 4481902342, 14529001194, 47085299068, 152520137944, 493941015012, 1599895591174, 5182983937428, 16791233651977]

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

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