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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 7 |
| 3 | 10 |
| 4 | 43 |
| 5 | 76 |
| 6 | 109 |
| 7 | 4312 |
| 8 | 7645 |
| 9 | 10978 |
| 10 | 43121011 |
| 11 | 76454344 |
| 12 | 109787677 |
| 13 | 431210111091010 |
| 14 | 7645434443124343 |
| 15 | 10978767776457676 |
| 16 | 43121011109101010978109109 |
| 17 | 76454344431243434312101143124312 |
| 18 | 109787677764576767645434476457645 |
| 19 | 431210111091010109781091091097876771097810978 |
[1,4,7,10,43,76,109,4312,7645,10978,43121011, 76454344,109787677,431210111091010, 7645434443124343,10978767776457676, 43121011109101010978109109, 76454344431243434312101143124312, 109787677764576767645434476457645, 431210111091010109781091091097876771097810978] |