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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.

A378039 a(1)=3; a(n>1) = n-th first difference of A120327(k) = least nonsquarefree number greater than k.

Table of values

n a(n)
1 3
2 0
3 0
4 4
5 0
6 0
7 0
8 1
9 3
10 0
11 0
12 4
13 0
14 0
15 0
16 2
17 0
18 2
19 0
20 4
21 0
22 0
23 0
24 1
25 2
26 0
27 1
28 4
29 0
30 0
31 0
32 4
33 0
34 0
35 0
36 4
37 0
38 0
39 0
40 4
41 0
42 0
43 0
44 1
45 3
46 0
47 0
48 1
49 1
50 2
51 0
52 2
53 0
54 2
55 0
56 4
57 0
58 0
59 0
60 3
61 0
62 0
63 1
64 4
65 0
66 0
67 0
68 4
69 0
70 0
71 0
72 3
73 0
74 0
75 1
76 4
77 0
78 0
79 0
80 1
81 3
82 0
83 0
84 4
85 0
86 0
87 0

List of values

[3, 0, 0, 4, 0, 0, 0, 1, 3, 0, 0, 4, 0, 0, 0, 2, 0, 2, 0, 4, 0, 0, 0, 1, 2, 0, 1, 4, 0, 0, 0, 4, 0, 0, 0, 4, 0, 0, 0, 4, 0, 0, 0, 1, 3, 0, 0, 1, 1, 2, 0, 2, 0, 2, 0, 4, 0, 0, 0, 3, 0, 0, 1, 4, 0, 0, 0, 4, 0, 0, 0, 3, 0, 0, 1, 4, 0, 0, 0, 1, 3, 0, 0, 4, 0, 0, 0]

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