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.

A140210 a(n) = Product_{h == 1 (mod 4) and h|n} h.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 5
6 1
7 1
8 1
9 9
10 5
11 1
12 1
13 13
14 1
15 5
16 1
17 17
18 9
19 1
20 5
21 21
22 1
23 1
24 1
25 125
26 13
27 9
28 1
29 29
30 5
31 1
32 1
33 33
34 17
35 5
36 9
37 37
38 1
39 13
40 5
41 41
42 21
43 1
44 1
45 2025
46 1
47 1
48 1
49 49
50 125
51 17
52 13
53 53
54 9
55 5
56 1
57 57
58 29
59 1
60 5
61 61
62 1
63 189
64 1
65 4225
66 33
67 1
68 17
69 69
70 5
71 1
72 9
73 73
74 37
75 125
76 1
77 77
78 13
79 1
80 5
81 729
82 41
83 1
84 21

List of values

[1, 1, 1, 1, 5, 1, 1, 1, 9, 5, 1, 1, 13, 1, 5, 1, 17, 9, 1, 5, 21, 1, 1, 1, 125, 13, 9, 1, 29, 5, 1, 1, 33, 17, 5, 9, 37, 1, 13, 5, 41, 21, 1, 1, 2025, 1, 1, 1, 49, 125, 17, 13, 53, 9, 5, 1, 57, 29, 1, 5, 61, 1, 189, 1, 4225, 33, 1, 17, 69, 5, 1, 9, 73, 37, 125, 1, 77, 13, 1, 5, 729, 41, 1, 21]