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.

A338904 Irregular triangle read by rows where row n lists all semiprimes whose prime indices sum to n.

Table of values

n a(n)
2 4
3 6
4 9
5 10
6 14
7 15
8 21
9 22
10 25
11 26
12 33
13 35
14 34
15 39
16 49
17 55
18 38
19 51
20 65
21 77
22 46
23 57
24 85
25 91
26 121
27 58
28 69
29 95
30 119
31 143
32 62
33 87
34 115
35 133
36 169
37 187
38 74
39 93
40 145
41 161
42 209
43 221
44 82
45 111
46 155
47 203
48 247
49 253
50 289
51 86
52 123
53 185
54 217
55 299
56 319
57 323
58 94
59 129
60 205

List of values

[4, 6, 9, 10, 14, 15, 21, 22, 25, 26, 33, 35, 34, 39, 49, 55, 38, 51, 65, 77, 46, 57, 85, 91, 121, 58, 69, 95, 119, 143, 62, 87, 115, 133, 169, 187, 74, 93, 145, 161, 209, 221, 82, 111, 155, 203, 247, 253, 289, 86, 123, 185, 217, 299, 319, 323, 94, 129, 205]

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

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