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.

A048342 Numbers k such that the concatenation of the numbers 1, 2, ..., k is squarefree.

Table of values

n a(n)
1 1
2 3
3 4
4 5
5 7
6 10
7 11
8 13
9 14
10 15
11 19
12 21
13 22
14 23
15 29
16 30
17 31
18 33
19 34
20 37
21 38
22 39
23 41
24 42
25 43
26 46
27 47
28 49
29 51
30 55
31 57
32 58
33 59
34 61
35 65
36 66
37 67
38 69
39 70
40 73
41 74
42 77
43 78
44 79
45 82
46 83
47 86
48 87
49 91
50 93
51 94
52 95
53 97
54 101
55 102
56 103
57 105
58 106
59 109
60 110
61 111
62 113
63 114
64 115

List of values

[1, 3, 4, 5, 7, 10, 11, 13, 14, 15, 19, 21, 22, 23, 29, 30, 31, 33, 34, 37, 38, 39, 41, 42, 43, 46, 47, 49, 51, 55, 57, 58, 59, 61, 65, 66, 67, 69, 70, 73, 74, 77, 78, 79, 82, 83, 86, 87, 91, 93, 94, 95, 97, 101, 102, 103, 105, 106, 109, 110, 111, 113, 114, 115]

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

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