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.

A353379 Primepi-based variant of the arithmetic derivative applied to the prime shadow of n.

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 1
6 4
7 1
8 3
9 2
10 4
11 1
12 7
13 1
14 4
15 4
16 4
17 1
18 7
19 1
20 7
21 4
22 4
23 1
24 11
25 2
26 4
27 3
28 7
29 1
30 12
31 1
32 5
33 4
34 4
35 4
36 12
37 1
38 4
39 4
40 11
41 1
42 12
43 1
44 7
45 7
46 4
47 1
48 15
49 2
50 7
51 4
52 7
53 1
54 11
55 4
56 11
57 4
58 4
59 1
60 20
61 1
62 4
63 7
64 6
65 4
66 12
67 1
68 7
69 4
70 12
71 1
72 19
73 1
74 4
75 7
76 7
77 4
78 12
79 1
80 15
81 4
82 4
83 1
84 20
85 4
86 4
87 4
88 11
89 1
90 20
91 4
92 7
93 4
94 4
95 4
96 21
97 1
98 7
99 7

List of values

[0, 1, 1, 2, 1, 4, 1, 3, 2, 4, 1, 7, 1, 4, 4, 4, 1, 7, 1, 7, 4, 4, 1, 11, 2, 4, 3, 7, 1, 12, 1, 5, 4, 4, 4, 12, 1, 4, 4, 11, 1, 12, 1, 7, 7, 4, 1, 15, 2, 7, 4, 7, 1, 11, 4, 11, 4, 4, 1, 20, 1, 4, 7, 6, 4, 12, 1, 7, 4, 12, 1, 19, 1, 4, 7, 7, 4, 12, 1, 15, 4, 4, 1, 20, 4, 4, 4, 11, 1, 20, 4, 7, 4, 4, 4, 21, 1, 7, 7]