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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.

A053231 First differences between n for which sigma(n) < sigma(n+1), which are not 2.

Table of values

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

List of values

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