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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.

A080172 Final digit of n-th Mersenne prime A000668(n).

Table of values

n a(n)
1 3
2 7
3 1
4 7
5 1
6 1
7 7
8 7
9 1
10 1
11 7
12 7
13 1
14 7
15 7
16 7
17 1
18 1
19 1
20 7
21 1
22 1
23 1
24 1
25 1
26 1
27 1
28 7
29 7
30 1
31 7
32 7
33 1
34 7
35 1
36 1
37 1
38 1
39 1
40 7
41 7
42 7
43 1
44 1
45 7
46 1
47 1
48 1

List of values

[3, 7, 1, 7, 1, 1, 7, 7, 1, 1, 7, 7, 1, 7, 7, 7, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 7, 7, 1, 7, 7, 1, 7, 1, 1, 1, 1, 1, 7, 7, 7, 1, 1, 7, 1, 1, 1]

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

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