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.

A099774 Number of divisors of 2*n-1.

Table of values

n a(n)
1 1
2 2
3 2
4 2
5 3
6 2
7 2
8 4
9 2
10 2
11 4
12 2
13 3
14 4
15 2
16 2
17 4
18 4
19 2
20 4
21 2
22 2
23 6
24 2
25 3
26 4
27 2
28 4
29 4
30 2
31 2
32 6
33 4
34 2
35 4
36 2
37 2
38 6
39 4
40 2
41 5
42 2
43 4
44 4
45 2
46 4
47 4
48 4
49 2
50 6
51 2
52 2
53 8
54 2
55 2
56 4
57 2
58 4
59 6
60 4
61 3
62 4
63 4
64 2
65 4
66 2
67 4
68 8
69 2
70 2
71 4
72 4
73 4
74 6
75 2
76 2
77 6
78 4
79 2
80 4
81 4
82 2
83 8
84 2
85 3
86 6
87 2
88 6
89 4
90 2
91 2
92 4
93 4
94 4
95 8
96 2
97 2
98 8
99 2
100 2
101 4
102 4
103 4
104 6
105 4

List of values

[1, 2, 2, 2, 3, 2, 2, 4, 2, 2, 4, 2, 3, 4, 2, 2, 4, 4, 2, 4, 2, 2, 6, 2, 3, 4, 2, 4, 4, 2, 2, 6, 4, 2, 4, 2, 2, 6, 4, 2, 5, 2, 4, 4, 2, 4, 4, 4, 2, 6, 2, 2, 8, 2, 2, 4, 2, 4, 6, 4, 3, 4, 4, 2, 4, 2, 4, 8, 2, 2, 4, 4, 4, 6, 2, 2, 6, 4, 2, 4, 4, 2, 8, 2, 3, 6, 2, 6, 4, 2, 2, 4, 4, 4, 8, 2, 2, 8, 2, 2, 4, 4, 4, 6, 4]