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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.

A141219 Write the n-th nonprime (A018252(n)) as a product of primes; increase one copy of the largest prime by 1 and decrease one copy of the smallest prime by 1, multiply the resulting numbers.

Table of values

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

List of values

[1, 3, 4, 6, 8, 6, 8, 8, 12, 12, 12, 12, 16, 12, 16, 24, 14, 24, 16, 18, 24, 24, 18, 32, 24, 20, 28, 24, 24, 24, 36, 24, 32, 48, 30, 36, 28, 36, 48, 32, 40, 30, 36, 32, 48, 48, 56, 36, 36, 48, 40, 48, 38, 60, 40, 72, 42, 48, 72, 42, 48, 72, 44, 60, 48, 54, 84]

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

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