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.

A377482 Iterated integer log of n: denote A001414(n) by b(n). a(n) = n if b(n) = n. Otherwise, a(n) = b(n) + b(b(n)) + ... + b^k(n), where k is the smallest integer such that b^k(n) is prime.

Table of values

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

List of values

[1, 2, 3, 4, 5, 5, 7, 11, 11, 7, 11, 7, 13, 20, 19, 19, 17, 19, 19, 20, 17, 13, 23, 20, 17, 34, 20, 11, 29, 17, 31, 17, 34, 19, 19, 17, 37, 38, 35, 11, 41, 19, 43, 34, 11, 42, 47, 11, 34, 19, 40, 17, 53, 11, 35, 13, 35, 31, 59, 19, 61, 67, 13, 19, 37, 35, 67]

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

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