Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 222 |
4 | -1 |
5 | -1 |
6 | 222 |
7 | 222222 |
8 | -1 |
9 | 222222222 |
10 | -1 |
11 | 22 |
12 | -1 |
13 | 222222 |
14 | 222222 |
15 | -1 |
16 | -1 |
17 | 2222222222222222 |
18 | 222222222 |
19 | 222222222222222222 |
20 | -1 |
21 | 222222 |
22 | 22 |
23 | 2222222222222222222222 |
24 | -1 |
25 | -1 |
26 | 222222 |
27 | 222222222222222222222222222 |
28 | -1 |
29 | 2222222222222222222222222222 |
30 | -1 |
31 | 222222222222222 |
32 | -1 |
33 | 222222 |
34 | 2222222222222222 |
35 | -1 |
36 | -1 |
37 | 222 |
38 | 222222222222222222 |
39 | 222222 |
40 | -1 |
41 | 22222 |
42 | 222222 |
[2,2,222,-1,-1,222,222222,-1,222222222,-1,22,-1, 222222,222222,-1,-1,2222222222222222,222222222, 222222222222222222,-1,222222,22, 2222222222222222222222,-1,-1,222222, 222222222222222222222222222,-1, 2222222222222222222222222222,-1,222222222222222, -1,222222,2222222222222222,-1,-1,222, 222222222222222222,222222,-1,22222,222222] |