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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.

A349988 a(n) is the smallest k such that n^k + (n+1)^k is divisible by a square > 1.

Table of values

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

List of values

[3, 5, 2, 1, 11, 10, 3, 10, 19, 3, 10, 1, 1, 29, 26, 3, 5, 3, 3, 2, 2, 1, 10, 1, 3, 10, 5, 2, 9, 3, 1, 5, 10, 3, 39, 10, 1, 7, 21, 1, 5, 5, 3, 21, 7, 2, 5, 10, 1, 78, 10, 3, 2, 26, 3, 10, 5, 1, 7, 1, 3, 1, 10, 3, 21, 7, 1, 3, 68, 3, 2, 5, 1, 21, 26, 1, 5, 2, 3]

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