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.

A178611 n-th semiprime minus sum of prime indices of the two factors of n-th semiprime.

Table of values

n a(n)
1 2
2 3
3 5
4 6
5 9
6 10
7 15
8 16
9 19
10 19
11 26
12 26
13 28
14 29
15 31
16 36
17 41
18 42
19 47
20 47
21 47
22 50
23 56
24 58
25 61
26 68
27 68
28 75
29 71
30 75
31 81
32 80
33 78
34 84
35 89
36 97
37 103
38 100
39 108
40 111
41 103
42 108
43 113
44 121
45 114
46 124
47 121
48 132
49 132
50 124
51 141
52 135
53 141
54 148
55 142
56 157
57 158
58 153
59 163
60 170
61 175
62 168

List of values

[2, 3, 5, 6, 9, 10, 15, 16, 19, 19, 26, 26, 28, 29, 31, 36, 41, 42, 47, 47, 47, 50, 56, 58, 61, 68, 68, 75, 71, 75, 81, 80, 78, 84, 89, 97, 103, 100, 108, 111, 103, 108, 113, 121, 114, 124, 121, 132, 132, 124, 141, 135, 141, 148, 142, 157, 158, 153, 163, 170, 175, 168]