n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | -1 |
4 | 1001 |
5 | 50 |
6 | -1 |
7 | 19 |
8 | 24 |
9 | 31 |
10 | 34 |
11 | 44 |
12 | 54 |
13 | 119 |
14 | 124 |
15 | 131 |
16 | 134 |
17 | 144 |
18 | 154 |
19 | 231 |
20 | 234 |
21 | 244 |
22 | 254 |
23 | 354 |
24 | 444 |
25 | 454 |
[1,4,-1,1001,50,-1,19,24,31,34,44,54,119,124,131, 134,144,154,231,234,244,254,354,444,454] |