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.

A091528 a(n) = (Sum_{k=1..n} H(k)*k!*(n-k)!) mod (n+1), where H(k) is the k-th harmonic number.

Table of values

n a(n)
1 1
2 1
3 0
4 3
5 4
6 2
7 0
8 6
9 6
10 5
11 0
12 3
13 8
14 0
15 0
16 13
17 0
18 3
19 0
20 0
21 12
22 17
23 0
24 0
25 14
26 0
27 0
28 1
29 0
30 6
31 0
32 0
33 18
34 0
35 0
36 1
37 20
38 0
39 0
40 23
41 0
42 25
43 0
44 0
45 24
46 44
47 0
48 0
49 0
50 0
51 0
52 36
53 0
54 0
55 0
56 0
57 30
58 8
59 0
60 36
61 32
62 0
63 0
64 0
65 0
66 10
67 0
68 0
69 0
70 2
71 0
72 56
73 38
74 0
75 0
76 0
77 0
78 19
79 0
80 0
81 42
82 48
83 0
84 0
85 44
86 0
87 0
88 6
89 0
90 0
91 0
92 0
93 48
94 0
95 0

List of values

[1, 1, 0, 3, 4, 2, 0, 6, 6, 5, 0, 3, 8, 0, 0, 13, 0, 3, 0, 0, 12, 17, 0, 0, 14, 0, 0, 1, 0, 6, 0, 0, 18, 0, 0, 1, 20, 0, 0, 23, 0, 25, 0, 0, 24, 44, 0, 0, 0, 0, 0, 36, 0, 0, 0, 0, 30, 8, 0, 36, 32, 0, 0, 0, 0, 10, 0, 0, 0, 2, 0, 56, 38, 0, 0, 0, 0, 19, 0, 0, 42, 48, 0, 0, 44, 0, 0, 6, 0, 0, 0, 0, 48, 0, 0]