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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.

A165911 a(n) = squarefree kernel (or radical) of a(n-1) + a(n-2), with a(0)=0 and a(1)=1.

Table of values

n a(n)
0 0
1 1
2 1
3 2
4 3
5 5
6 2
7 7
8 3
9 10
10 13
11 23
12 6
13 29
14 35
15 2
16 37
17 39
18 38
19 77
20 115
21 6
22 11
23 17
24 14
25 31
26 15
27 46
28 61
29 107
30 42
31 149
32 191
33 170
34 19
35 21
36 10
37 31
38 41
39 6
40 47
41 53
42 10
43 21
44 31
45 26
46 57
47 83
48 70
49 51
50 11
51 62
52 73
53 15
54 22
55 37
56 59
57 6
58 65
59 71
60 34
61 105
62 139
63 122
64 87
65 209
66 74
67 283
68 357
69 10

List of values

[0, 1, 1, 2, 3, 5, 2, 7, 3, 10, 13, 23, 6, 29, 35, 2, 37, 39, 38, 77, 115, 6, 11, 17, 14, 31, 15, 46, 61, 107, 42, 149, 191, 170, 19, 21, 10, 31, 41, 6, 47, 53, 10, 21, 31, 26, 57, 83, 70, 51, 11, 62, 73, 15, 22, 37, 59, 6, 65, 71, 34, 105, 139, 122, 87, 209, 74, 283, 357, 10]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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