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.

A185687 Irregular triangle, read by rows, of primes with prefix n and digits "9" appended, otherwise 0.

Table of values

n a(n)
1 19
2 199
3 1999
4 29
5 0
6 0
7 59
8 599
9 0
10 79
11 89
12 0
13 109
14 0
15 0
16 139
17 1399
18 13999
19 139999
20 1399999
21 149
22 1499
23 0
24 0
25 179
26 0
27 199
28 1999
29 0
30 0
31 229
32 239
33 2399
34 0
35 0
36 269
37 2699
38 0
39 0
40 0
41 0
42 0
43 0
44 0
45 349
46 3499
47 359
48 0
49 379
50 389
51 0
52 409
53 4099
54 419
55 0
56 439
57 449
58 0
59 0
60 479
61 4799
62 0
63 499
64 4999
65 49999
66 509
67 5099
68 0
69 0
70 0
71 0
72 0
73 569
74 0
75 0
76 599
77 0
78 619

List of values

[19, 199, 1999, 29, 0, 0, 59, 599, 0, 79, 89, 0, 109, 0, 0, 139, 1399, 13999, 139999, 1399999, 149, 1499, 0, 0, 179, 0, 199, 1999, 0, 0, 229, 239, 2399, 0, 0, 269, 2699, 0, 0, 0, 0, 0, 0, 0, 349, 3499, 359, 0, 379, 389, 0, 409, 4099, 419, 0, 439, 449, 0, 0, 479, 4799, 0, 499, 4999, 49999, 509, 5099, 0, 0, 0, 0, 0, 569, 0, 0, 599, 0, 619]