n | a(n) |
---|---|
1 | 0 |
2 | 7 |
3 | 70 |
4 | 88 |
5 | 97 |
6 | 700 |
7 | 707 |
8 | 878 |
9 | 880 |
10 | 948 |
11 | 970 |
12 | 997 |
13 | 7000 |
14 | 7007 |
15 | 7070 |
16 | 8780 |
17 | 8798 |
18 | 8800 |
19 | 8947 |
20 | 9480 |
21 | 9700 |
22 | 9898 |
23 | 9970 |
24 | 9997 |
25 | 70000 |
26 | 70007 |
27 | 70070 |
28 | 70700 |
29 | 70707 |
30 | 87798 |
31 | 87800 |
32 | 87980 |
33 | 88000 |
34 | 89448 |
35 | 89470 |
36 | 94800 |
37 | 97000 |
38 | 98980 |
39 | 99448 |
40 | 99700 |
41 | 99970 |
42 | 99997 |
43 | 700000 |
44 | 700007 |
45 | 700070 |
46 | 700700 |
47 | 707000 |
48 | 707070 |
49 | 877898 |
50 | 877980 |
51 | 877998 |
52 | 878000 |
53 | 879800 |
[0,7,70,88,97,700,707,878,880,948,970,997,7000, 7007,7070,8780,8798,8800,8947,9480,9700,9898,9970, 9997,70000,70007,70070,70700,70707,87798,87800, 87980,88000,89448,89470,94800,97000,98980,99448, 99700,99970,99997,700000,700007,700070,700700, 707000,707070,877898,877980,877998,878000,879800] |