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.

A293447 Fully additive with a(p^e) = e * A000225(PrimePi(p)), where PrimePi(n) = A000720(n) and A000225(n) = (2^n)-1.

Table of values

n a(n)
1 0
2 1
3 3
4 2
5 7
6 4
7 15
8 3
9 6
10 8
11 31
12 5
13 63
14 16
15 10
16 4
17 127
18 7
19 255
20 9
21 18
22 32
23 511
24 6
25 14
26 64
27 9
28 17
29 1023
30 11
31 2047
32 5
33 34
34 128
35 22
36 8
37 4095
38 256
39 66
40 10
41 8191
42 19
43 16383
44 33
45 13
46 512
47 32767
48 7
49 30
50 15
51 130
52 65
53 65535
54 10
55 38
56 18
57 258
58 1024
59 131071
60 12
61 262143
62 2048
63 21
64 6
65 70
66 35
67 524287
68 129
69 514
70 23
71 1048575
72 9
73 2097151
74 4096
75 17
76 257
77 46
78 67
79 4194303
80 11
81 12

List of values

[0, 1, 3, 2, 7, 4, 15, 3, 6, 8, 31, 5, 63, 16, 10, 4, 127, 7, 255, 9, 18, 32, 511, 6, 14, 64, 9, 17, 1023, 11, 2047, 5, 34, 128, 22, 8, 4095, 256, 66, 10, 8191, 19, 16383, 33, 13, 512, 32767, 7, 30, 15, 130, 65, 65535, 10, 38, 18, 258, 1024, 131071, 12, 262143, 2048, 21, 6, 70, 35, 524287, 129, 514, 23, 1048575, 9, 2097151, 4096, 17, 257, 46, 67, 4194303, 11, 12]