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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.

A271419 If n is a ludic number, a(n)=0; if n is not a ludic number, a(n) is the ludic number that rejects n from the ludic number sieve.

Table of values

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

List of values

[0, 0, 0, 2, 0, 2, 0, 2, 3, 2, 0, 2, 0, 2, 3, 2, 0, 2, 5, 2, 3, 2, 0, 2, 0, 2, 3, 2, 0, 2, 7, 2, 3, 2, 5, 2, 0, 2, 3, 2, 0, 2, 0, 2, 3, 2, 0, 2, 5, 2, 3, 2, 0, 2, 11, 2, 3, 2, 7, 2, 0, 2, 3, 2, 5, 2, 0, 2, 3, 2, 0, 2, 13, 2, 3, 2, 0, 2, 5, 2, 3, 2, 0, 2, 7]

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