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.

A138819 Concatenation of final digit of n-th even superperfect number A061652(n), final digit of n-th Mersenne prime A000668(n) and final digit of n-th perfect number A000396(n).

Table of values

n a(n)
1 236
2 478
3 616
4 478
5 616
6 616
7 478
8 478
9 616
10 616
11 478
12 478
13 616
14 478
15 478
16 478
17 616
18 616
19 616
20 478
21 616
22 616
23 616
24 616
25 616
26 616
27 616
28 478
29 478
30 616
31 478
32 478
33 616
34 478
35 616
36 616
37 616
38 616
39 616

List of values

[236, 478, 616, 478, 616, 616, 478, 478, 616, 616, 478, 478, 616, 478, 478, 478, 616, 616, 616, 478, 616, 616, 616, 616, 616, 616, 616, 478, 478, 616, 478, 478, 616, 478, 616, 616, 616, 616, 616]

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

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