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.

A383878 Number of permutations of [n] with distinct cycle lengths whose GCD is 1.

Table of values

n a(n)
0 0
1 1
2 0
3 3
4 8
5 50
6 264
7 2394
8 15840
9 158976
10 1490400
11 20124720
12 181543680
13 3213905760
14 36459964800
15 602127540000
16 9045463311360
17 187660890063360
18 2596164765465600
19 64849189355274240
20 1037566851245568000
21 24684232291242854400
22 498833466644833689600

List of values

[0, 1, 0, 3, 8, 50, 264, 2394, 15840, 158976, 1490400, 20124720, 181543680, 3213905760, 36459964800, 602127540000, 9045463311360, 187660890063360, 2596164765465600, 64849189355274240, 1037566851245568000, 24684232291242854400, 498833466644833689600]

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

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