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.

A133924 a(n) = number of exponents occurring only once each in the prime factorization of n!.

Table of values

n a(n)
0 0
1 0
2 1
3 0
4 2
5 1
6 3
7 2
8 2
9 2
10 4
11 3
12 3
13 3
14 2
15 4
16 4
17 4
18 4
19 4
20 4
21 4
22 5
23 5
24 5
25 5
26 4
27 4
28 4
29 4
30 4
31 4
32 4
33 6
34 5
35 5
36 5
37 5
38 5
39 4
40 4
41 4
42 4
43 4
44 6
45 6
46 6
47 6
48 6
49 6
50 6
51 5
52 5
53 5
54 5
55 7
56 7
57 7
58 6
59 6
60 6
61 6
62 6
63 6
64 6
65 4
66 6
67 6
68 8
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 9
86 9
87 8
88 8
89 8
90 8
91 8
92 8
93 7
94 7
95 7
96 7
97 7
98 7
99 7
100 7
101 7
102 9
103 9
104 9

List of values

[0, 0, 1, 0, 2, 1, 3, 2, 2, 2, 4, 3, 3, 3, 2, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 6, 6, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 9, 9, 9]

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

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