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.

A138817 Concatenation of final digit of n-th Mersenne prime A000668(n), final digit of n-th even superperfect number A061652(n) and final digit of n-th perfect number A000396(n).

Table of values

n a(n)
1 326
2 748
3 166
4 748
5 166
6 166
7 748
8 748
9 166
10 166
11 748
12 748
13 166
14 748
15 748
16 748
17 166
18 166
19 166
20 748
21 166
22 166
23 166
24 166
25 166
26 166
27 166
28 748
29 748
30 166
31 748
32 748
33 166
34 748
35 166
36 166
37 166
38 166
39 166

List of values

[326, 748, 166, 748, 166, 166, 748, 748, 166, 166, 748, 748, 166, 748, 748, 748, 166, 166, 166, 748, 166, 166, 166, 166, 166, 166, 166, 748, 748, 166, 748, 748, 166, 748, 166, 166, 166, 166, 166]

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

Content is available under The OEIS End-User License Agreement.