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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.

A212641 Largest odd divisor of A212640(n) (number of divisors of n-th powerful number that is the first integer of its prime signature).

Table of values

n a(n)
1 1
2 3
3 1
4 5
5 3
6 9
7 7
8 3
9 1
10 15
11 1
12 9
13 9
14 5
15 5
16 21
17 3
18 27
19 11
20 3
21 25
22 7
23 9
24 3
25 27
26 15
27 1
28 45
29 13
30 15
31 35
32 3
33 9
34 27
35 9
36 7
37 33
38 5
39 15
40 5
41 63
42 21
43 15
44 9
45 45
46 9
47 1
48 11
49 9
50 3
51 75
52 1
53 39
54 25
55 21
56 81
57 49
58 5
59 3
60 81
61 27
62 45
63 17
64 21
65 55
66 3
67 27
68 7
69 3
70 13
71 45
72 15
73 105
74 9
75 45

List of values

[1, 3, 1, 5, 3, 9, 7, 3, 1, 15, 1, 9, 9, 5, 5, 21, 3, 27, 11, 3, 25, 7, 9, 3, 27, 15, 1, 45, 13, 15, 35, 3, 9, 27, 9, 7, 33, 5, 15, 5, 63, 21, 15, 9, 45, 9, 1, 11, 9, 3, 75, 1, 39, 25, 21, 81, 49, 5, 3, 81, 27, 45, 17, 21, 55, 3, 27, 7, 3, 13, 45, 15, 105, 9, 45]

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

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