cp's OEIS Frontend

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.

A100676 a(1) = 1; a(n+1) = Sum_{k=1..n} a(gcd(a(k),n)).

Table of values

n a(n)
1 1
2 1
3 2
4 3
5 4
6 5
7 7
8 13
9 10
10 10
11 31
12 11
13 15
14 27
15 20
16 48
17 67
18 17
19 33
20 19
21 66
22 33
23 144
24 23
25 81
26 40
27 40
28 120
29 48
30 29
31 146
32 176
33 260
34 878
35 100
36 71
37 176
38 37
39 70
40 78
41 420
42 41
43 144
44 43
45 274
46 172
47 189
48 47
49 407
50 73
51 209
52 132
53 266
54 53
55 235
56 364
57 478
58 169
59 105
60 59
61 411
62 61
63 207
64 479

List of values

[1, 1, 2, 3, 4, 5, 7, 13, 10, 10, 31, 11, 15, 27, 20, 48, 67, 17, 33, 19, 66, 33, 144, 23, 81, 40, 40, 120, 48, 29, 146, 176, 260, 878, 100, 71, 176, 37, 70, 78, 420, 41, 144, 43, 274, 172, 189, 47, 407, 73, 209, 132, 266, 53, 235, 364, 478, 169, 105, 59, 411, 61, 207, 479]

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

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