Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | -1 |
3 | 111 |
4 | -1 |
5 | -1 |
6 | -1 |
7 | 111111 |
8 | -1 |
9 | 111111111 |
10 | -1 |
11 | 11 |
12 | -1 |
13 | 111111 |
14 | -1 |
15 | -1 |
16 | -1 |
17 | 1111111111111111 |
18 | -1 |
19 | 111111111111111111 |
20 | -1 |
21 | 111111 |
22 | -1 |
23 | 1111111111111111111111 |
24 | -1 |
25 | -1 |
26 | -1 |
27 | 111111111111111111111111111 |
28 | -1 |
29 | 1111111111111111111111111111 |
30 | -1 |
31 | 111111111111111 |
32 | -1 |
33 | 111111 |
34 | -1 |
35 | -1 |
36 | -1 |
37 | 111 |
38 | -1 |
39 | 111111 |
40 | -1 |
41 | 11111 |
42 | -1 |
[1,-1,111,-1,-1,-1,111111,-1,111111111,-1,11,-1, 111111,-1,-1,-1,1111111111111111,-1, 111111111111111111,-1,111111,-1, 1111111111111111111111,-1,-1,-1, 111111111111111111111111111,-1, 1111111111111111111111111111,-1,111111111111111, -1,111111,-1,-1,-1,111,-1,111111,-1,11111,-1] |