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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.

A346066 Sum of GCD of cycle lengths over all permutations of [n].

Table of values

n a(n)
0 0
1 1
2 3
3 10
4 45
5 216
6 1505
7 9360
8 84105
9 730240
10 7715169
11 76204800
12 1090114025
13 11975040000
14 185501455425
15 2791872219136
16 45361870178625
17 690452066304000
18 14415096609538625
19 236887827111936000
20 5448878874163974249
21 108418310412206080000
22 2381309423564793710625

List of values

[0, 1, 3, 10, 45, 216, 1505, 9360, 84105, 730240, 7715169, 76204800, 1090114025, 11975040000, 185501455425, 2791872219136, 45361870178625, 690452066304000, 14415096609538625, 236887827111936000, 5448878874163974249, 108418310412206080000, 2381309423564793710625]

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

Content is available under The OEIS End-User License Agreement.