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.

A172404 Numbers k such that 3 is the first digit of 2^k.

Table of values

n a(n)
1 5
2 15
3 25
4 35
5 45
6 55
7 65
8 75
9 78
10 85
11 88
12 95
13 98
14 108
15 118
16 128
17 138
18 148
19 158
20 168
21 178
22 181
23 188
24 191
25 201
26 211
27 221
28 231
29 241
30 251
31 261
32 271
33 274
34 281
35 284
36 291
37 294
38 304
39 314
40 324
41 334
42 344
43 354
44 364
45 367
46 374
47 377
48 384
49 387
50 397
51 407
52 417
53 427
54 437
55 447
56 457
57 467
58 470
59 477
60 480
61 487
62 490
63 500

List of values

[5, 15, 25, 35, 45, 55, 65, 75, 78, 85, 88, 95, 98, 108, 118, 128, 138, 148, 158, 168, 178, 181, 188, 191, 201, 211, 221, 231, 241, 251, 261, 271, 274, 281, 284, 291, 294, 304, 314, 324, 334, 344, 354, 364, 367, 374, 377, 384, 387, 397, 407, 417, 427, 437, 447, 457, 467, 470, 477, 480, 487, 490, 500]

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

Content is available under The OEIS End-User License Agreement.