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.

A276841 Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most seven elements.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 5040
8 20160
9 75600
10 287280
11 1133550
12 4686660
13 20368569
14 93109737
15 406088940
16 1719126780
17 7184340564
18 29966843736
19 125593803792
20 530881463680
21 2267064321984
22 9681953067016
23 41200660295772
24 174712473986620
25 739333708856220

List of values

[1, 1, 2, 6, 24, 120, 720, 5040, 20160, 75600, 287280, 1133550, 4686660, 20368569, 93109737, 406088940, 1719126780, 7184340564, 29966843736, 125593803792, 530881463680, 2267064321984, 9681953067016, 41200660295772, 174712473986620, 739333708856220]

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

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