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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.

A308983 Numbers n such that A308803(2n+1) = (2*10^n-1)(5*10^n+1).

Table of values

n a(n)
1 4
2 15
3 18
4 20
5 23
6 29
7 33
8 34
9 35
10 36
11 38
12 39
13 43
14 48
15 49
16 50
17 54
18 56
19 60
20 62
21 63
22 66
23 68
24 69
25 74
26 75
27 77
28 78
29 81
30 83
31 84
32 86
33 88
34 89

List of values

[4, 15, 18, 20, 23, 29, 33, 34, 35, 36, 38, 39, 43, 48, 49, 50, 54, 56, 60, 62, 63, 66, 68, 69, 74, 75, 77, 78, 81, 83, 84, 86, 88, 89]

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

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