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.

A285803 Numbers k such that both k and 2k contain the digit 7.

Table of values

n a(n)
1 37
2 87
3 137
4 187
5 237
6 287
7 337
8 357
9 367
10 370
11 371
12 372
13 373
14 374
15 375
16 376
17 377
18 378
19 379
20 387
21 397
22 437
23 487
24 537
25 587
26 637
27 687
28 735
29 736
30 737
31 738
32 739
33 785
34 786
35 787
36 788
37 789
38 837
39 857
40 867
41 870
42 871
43 872
44 873
45 874
46 875
47 876
48 877
49 878
50 879
51 887
52 897
53 937

List of values

[37, 87, 137, 187, 237, 287, 337, 357, 367, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 387, 397, 437, 487, 537, 587, 637, 687, 735, 736, 737, 738, 739, 785, 786, 787, 788, 789, 837, 857, 867, 870, 871, 872, 873, 874, 875, 876, 877, 878, 879, 887, 897, 937]