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.

A233342 Rectangular array by antidiagonals: row n shows the numbers m for which n is the number of applications of the mapping r(k) = k - (greatest prime divisor or k) required to map m to 0.

Table of values

n a(n)
1 1
2 2
3 4
4 3
5 6
6 8
7 5
8 10
9 9
10 12
11 7
12 14
13 15
14 18
15 25
16 11
17 22
18 16
19 20
20 27
21 30
22 13
23 26
24 21
25 24
26 35
27 40
28 32
29 17
30 34
31 33
32 28
33 55
34 42
35 45
36 48
37 19
38 38
39 39
40 36
41 65
42 60
43 49
44 50
45 63
46 23
47 46
48 51
49 44
50 85
51 66
52 77
53 56
54 99
55 70
56 29
57 58
58 57
59 52
60 95
61 78
62 81
63 84
64 105
65 108
66 75

List of values

[1, 2, 4, 3, 6, 8, 5, 10, 9, 12, 7, 14, 15, 18, 25, 11, 22, 16, 20, 27, 30, 13, 26, 21, 24, 35, 40, 32, 17, 34, 33, 28, 55, 42, 45, 48, 19, 38, 39, 36, 65, 60, 49, 50, 63, 23, 46, 51, 44, 85, 66, 77, 56, 99, 70, 29, 58, 57, 52, 95, 78, 81, 84, 105, 108, 75]

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

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