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.

A297402 a(n) = gcd_{k=1..n} (prime(k+1)^n-1)/2.

Table of values

n a(n)
1 1
2 4
3 1
4 8
5 1
6 4
7 1
8 16
9 1
10 4
11 1
12 8
13 1
14 4
15 1
16 32
17 1
18 4
19 1
20 8
21 1
22 4
23 1
24 16
25 1
26 4
27 1
28 8
29 1
30 4
31 1
32 64
33 1
34 4
35 1
36 8
37 1
38 4
39 1
40 16
41 1
42 4
43 1
44 8
45 1
46 4
47 1
48 32
49 1
50 4
51 1
52 8
53 1
54 4
55 1
56 16
57 1
58 4
59 1
60 8
61 1
62 4
63 1
64 128
65 1
66 4
67 1
68 8
69 1
70 4
71 1
72 16
73 1
74 4
75 1
76 8
77 1
78 4
79 1
80 32
81 1
82 4
83 1
84 8
85 1
86 4
87 1
88 16
89 1
90 4
91 1
92 8
93 1
94 4
95 1
96 64
97 1
98 4
99 1
100 8

List of values

[1, 4, 1, 8, 1, 4, 1, 16, 1, 4, 1, 8, 1, 4, 1, 32, 1, 4, 1, 8, 1, 4, 1, 16, 1, 4, 1, 8, 1, 4, 1, 64, 1, 4, 1, 8, 1, 4, 1, 16, 1, 4, 1, 8, 1, 4, 1, 32, 1, 4, 1, 8, 1, 4, 1, 16, 1, 4, 1, 8, 1, 4, 1, 128, 1, 4, 1, 8, 1, 4, 1, 16, 1, 4, 1, 8, 1, 4, 1, 32, 1, 4, 1, 8, 1, 4, 1, 16, 1, 4, 1, 8, 1, 4, 1, 64, 1, 4, 1, 8]