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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.

A204455 Squarefree product of all odd primes dividing n, and 1 if n is a power of 2: A099985/2.

Table of values

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

List of values

[1, 1, 3, 1, 5, 3, 7, 1, 3, 5, 11, 3, 13, 7, 15, 1, 17, 3, 19, 5, 21, 11, 23, 3, 5, 13, 3, 7, 29, 15, 31, 1, 33, 17, 35, 3, 37, 19, 39, 5, 41, 21, 43, 11, 15, 23, 47, 3, 7, 5, 51, 13, 53, 3, 55, 7, 57, 29, 59, 15, 61, 31, 21, 1, 65, 33, 67, 17, 69, 35, 71, 3]

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

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