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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.

A056813 Largest non-unitary prime factor of LCM(1,...,n); that is, the largest prime which occurs to power > 1 in prime factorization of LCM(1,..,n).

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 2
7 2
8 2
9 3
10 3
11 3
12 3
13 3
14 3
15 3
16 3
17 3
18 3
19 3
20 3
21 3
22 3
23 3
24 3
25 5
26 5
27 5
28 5
29 5
30 5
31 5
32 5
33 5
34 5
35 5
36 5
37 5
38 5
39 5
40 5
41 5
42 5
43 5
44 5
45 5
46 5
47 5
48 5
49 7
50 7
51 7
52 7
53 7
54 7
55 7
56 7
57 7
58 7
59 7
60 7
61 7
62 7
63 7
64 7
65 7
66 7
67 7
68 7
69 7
70 7
71 7
72 7
73 7
74 7
75 7
76 7
77 7
78 7
79 7
80 7
81 7
82 7
83 7
84 7
85 7
86 7
87 7
88 7
89 7
90 7
91 7
92 7
93 7
94 7
95 7
96 7
97 7
98 7
99 7
100 7
101 7
102 7
103 7
104 7
105 7

List of values

[1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]

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

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