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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 41 |
| 4 | 1234 |
| 5 | 4115 |
| 6 | 41152 |
| 7 | 1234567 |
| 8 | 1371742 |
| 9 | 13717421 |
| 10 | 12345678910 |
| 11 | 411522630337 |
| 12 | 41152263033704 |
| 13 | 12345678910111213 |
| 14 | 411522630337040438 |
| 15 | 41152263033704043805 |
| 16 | 12345678910111213141516 |
| 17 | 137174210112346812683513 |
| 18 | 13717421011234681268351302 |
[1,4,41,1234,4115,41152,1234567,1371742,13717421, 12345678910,411522630337,41152263033704, 12345678910111213,411522630337040438, 41152263033704043805,12345678910111213141516, 137174210112346812683513, 13717421011234681268351302] |