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.

A327028 T(n, k) = k! * Sum_{d|n} phi(d) * A008284(n/d, k) for n >= 1, T(0, k) = 0^k. Triangle read by rows for 0 <= k <= n.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 2
5 2
6 0
7 3
8 2
9 6
10 0
11 4
12 6
13 6
14 24
15 0
16 5
17 4
18 12
19 24
20 120
21 0
22 6
23 12
24 24
25 48
26 120
27 720
28 0
29 7
30 6
31 24
32 72
33 240
34 720
35 5040
36 0
37 8
38 16
39 36
40 144
41 360
42 1440
43 5040
44 40320
45 0
46 9
47 12
48 54
49 144
50 600
51 2160
52 10080
53 40320
54 362880

List of values

[1, 0, 1, 0, 2, 2, 0, 3, 2, 6, 0, 4, 6, 6, 24, 0, 5, 4, 12, 24, 120, 0, 6, 12, 24, 48, 120, 720, 0, 7, 6, 24, 72, 240, 720, 5040, 0, 8, 16, 36, 144, 360, 1440, 5040, 40320, 0, 9, 12, 54, 144, 600, 2160, 10080, 40320, 362880]