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.

A090340 Difference between the sums of the prime factors, including multiplicity, of n and those of n + 1.

Table of values

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

List of values

[-2, -1, -1, -1, 0, -2, 1, 0, -1, -4, 4, -6, 4, 1, 0, -9, 9, -11, 10, -1, -3, -10, 14, -1, -5, 6, -2, -18, 19, -21, 21, -4, -5, 7, 2, -27, 16, 5, 5, -30, 29, -31, 28, 4, -14, -22, 36, -3, 2, -8, 3, -36, 42, -5, 3, -9, -9, -28, 47, -49, 28, 20, 1, -6, 2, -51, 46, -5, 12, -57, 59, -61, 34, 26, -10, 5, 0, -61, 66, 1, -31, -40, 69, -8, -23, 13]