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A240232 a(n) is the smallest positive integer such that prime(n) + a(n) and prime(n) + a(n)^2 are both prime numbers.

Table of values

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

List of values

[1, 2, 6, 4, 6, 4, 6, 12, 6, 12, 6, 4, 30, 4, 6, 6, 42, 6, 4, 30, 6, 10, 24, 12, 4, 6, 6, 24, 18, 36, 10, 6, 12, 10, 30, 30, 6, 4, 12, 54, 18, 10, 6, 6, 30, 28, 16, 4, 6, 12, 6, 12, 66, 30, 6, 18, 78, 6, 4, 30, 10, 18, 24, 6, 36, 30, 6, 16, 6, 10, 6, 30, 34, 6]

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