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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.

A053239 First differences between n for which sigma(n) > sigma(n+1), which are not 2.

Table of values

n a(n)
1 4
2 1
3 1
4 4
5 4
6 1
7 1
8 1
9 1
10 4
11 4
12 1
13 1
14 4
15 4
16 1
17 1
18 4
19 1
20 1
21 1
22 1
23 3
24 1
25 1
26 1
27 1
28 1
29 4
30 3
31 1
32 4
33 1
34 1
35 4
36 4
37 1
38 1
39 3
40 1
41 4
42 1
43 1
44 4
45 1
46 1
47 4
48 1
49 1
50 4
51 4
52 4
53 3
54 1
55 1
56 1
57 4
58 4
59 3
60 1
61 1
62 1
63 4
64 4
65 1
66 1
67 1
68 1
69 4
70 1
71 1
72 1
73 1
74 4
75 3
76 1
77 4
78 4
79 1
80 1
81 4
82 4
83 1
84 1
85 3
86 1
87 3
88 1
89 1
90 1
91 1
92 1
93 4
94 4
95 1
96 1
97 4
98 1
99 1
100 4
101 4
102 3
103 1
104 3
105 1

List of values

[4, 1, 1, 4, 4, 1, 1, 1, 1, 4, 4, 1, 1, 4, 4, 1, 1, 4, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 4, 3, 1, 4, 1, 1, 4, 4, 1, 1, 3, 1, 4, 1, 1, 4, 1, 1, 4, 1, 1, 4, 4, 4, 3, 1, 1, 1, 4, 4, 3, 1, 1, 1, 4, 4, 1, 1, 1, 1, 4, 1, 1, 1, 1, 4, 3, 1, 4, 4, 1, 1, 4, 4, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 4, 4, 1, 1, 4, 1, 1, 4, 4, 3, 1, 3, 1]