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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.

A286540 a(n) = gcd(A259934(n), A259934(n-1)) = A009191(A259934(n)).

Table of values

n a(n)
1 2
2 2
3 6
4 6
5 2
6 2
7 2
8 2
9 2
10 2
11 2
12 2
13 2
14 2
15 6
16 2
17 2
18 2
19 2
20 2
21 1
22 1
23 1
24 3
25 8
26 2
27 2
28 2
29 2
30 2
31 2
32 2
33 2
34 2
35 2
36 2
37 2
38 2
39 2
40 2
41 2
42 2
43 6
44 2
45 2
46 2
47 2
48 2
49 6
50 2
51 2
52 2
53 2
54 2
55 2
56 2
57 2
58 2
59 2
60 2
61 2
62 2
63 2
64 2
65 2
66 2
67 6
68 2
69 2
70 6
71 2
72 2
73 6
74 2
75 2
76 2
77 2
78 2
79 2
80 2
81 6
82 2
83 2
84 2
85 2
86 2
87 2
88 2
89 2
90 2
91 2
92 2
93 2
94 2
95 2
96 2
97 2
98 2
99 6
100 2
101 2
102 8
103 8
104 24
105 18
106 2
107 2
108 2
109 2
110 2
111 2
112 2
113 6
114 2
115 2
116 2
117 2
118 2
119 2
120 6

List of values

[2, 2, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 1, 1, 1, 3, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 6, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 8, 8, 24, 18, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 6]

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