n | a(n) |
---|---|
1 | -1 |
2 | 14 |
3 | 4 |
4 | -1 |
5 | 1014 |
6 | 1004 |
7 | 30 |
8 | 40 |
9 | 24 |
10 | 1030 |
11 | 34 |
12 | 44 |
13 | 54 |
14 | 140 |
15 | 124 |
16 | 404 |
17 | 134 |
18 | 144 |
19 | 154 |
20 | 324 |
21 | 234 |
22 | 244 |
23 | 254 |
24 | 354 |
25 | 444 |
26 | 454 |
27 | 1354 |
28 | 1444 |
29 | 1454 |
30 | 2354 |
31 | 2444 |
32 | 2454 |
33 | 3454 |
34 | 4444 |
35 | 4454 |
[-1,14,4,-1,1014,1004,30,40,24,1030,34,44,54,140, 124,404,134,144,154,324,234,244,254,354,444,454, 1354,1444,1454,2354,2444,2454,3454,4444,4454] |