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.

A284380 Numbers k with digits 5 and 7 only.

Table of values

n a(n)
1 5
2 7
3 55
4 57
5 75
6 77
7 555
8 557
9 575
10 577
11 755
12 757
13 775
14 777
15 5555
16 5557
17 5575
18 5577
19 5755
20 5757
21 5775
22 5777
23 7555
24 7557
25 7575
26 7577
27 7755
28 7757
29 7775
30 7777
31 55555
32 55557
33 55575
34 55577
35 55755
36 55757
37 55775
38 55777
39 57555
40 57557
41 57575
42 57577
43 57755
44 57757

List of values

[5, 7, 55, 57, 75, 77, 555, 557, 575, 577, 755, 757, 775, 777, 5555, 5557, 5575, 5577, 5755, 5757, 5775, 5777, 7555, 7557, 7575, 7577, 7755, 7757, 7775, 7777, 55555, 55557, 55575, 55577, 55755, 55757, 55775, 55777, 57555, 57557, 57575, 57577, 57755, 57757]