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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 2131 |
| 3 | 121313 |
| 4 | 51213137 |
| 5 | 3512131379 |
| 6 | 135121313797 |
| 7 | 21351213137977 |
| 8 | 5213512131379777 |
| 9 | 352135121313797771 |
| 10 | 63521351213137977713 |
| 11 | 16352135121313797771319 |
| 12 | 9163521351213137977713193 |
[13,2131,121313,51213137,3512131379,135121313797, 21351213137977,5213512131379777, 352135121313797771,63521351213137977713, 16352135121313797771319,9163521351213137977713193] |