cp's OEIS Frontend

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.

A059957 Sum of number of distinct prime factors of n and n+1, or number of distinct prime factors of n(n+1) or of lcm(n,n+1).

Table of values

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

List of values

[1, 2, 2, 2, 3, 3, 2, 2, 3, 3, 3, 3, 3, 4, 3, 2, 3, 3, 3, 4, 4, 3, 3, 3, 3, 3, 3, 3, 4, 4, 2, 3, 4, 4, 4, 3, 3, 4, 4, 3, 4, 4, 3, 4, 4, 3, 3, 3, 3, 4, 4, 3, 3, 4, 4, 4, 4, 3, 4, 4, 3, 4, 3, 3, 5, 4, 3, 4, 5, 4, 3, 3, 3, 4, 4, 4, 5, 4, 3, 3, 3, 3, 4, 5, 4, 4, 4, 3, 4, 5, 4, 4, 4, 4, 4, 3, 3, 4, 4, 3, 4, 4, 3, 5, 5]