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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.

A239669 Total number of prime factors counted with multiplicity of prime(n)-1 and prime(n)+1, where prime(n) is the n-th prime.

Table of values

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

List of values

[1, 3, 4, 5, 5, 5, 7, 6, 6, 6, 8, 6, 7, 6, 7, 7, 6, 6, 6, 8, 7, 8, 6, 8, 9, 7, 7, 7, 8, 8, 11, 7, 7, 7, 7, 8, 6, 8, 7, 6, 7, 8, 10, 9, 8, 9, 7, 9, 6, 7, 8, 9, 9, 9, 11, 7, 8, 10, 6, 8, 6, 7, 8, 8, 7, 6, 7, 9, 6, 8, 9, 8, 8, 7, 9, 10, 7, 7, 9, 8, 8, 7, 10, 10]

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

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