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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 9 |
| 3 | 19 |
| 4 | 84 |
| 5 | 819 |
| 6 | 19929 |
| 7 | 4968964 |
| 8 | 32299934229 |
| 9 | 22650860119442104 |
| 10 | 64622859204336398690105709 |
| 11 | 37417737354038427535937949715303251763909 |
| 12 | 10839565003114573305286763426362520300989660289144540301999534964 |
[4,9,19,84,819,19929,4968964,32299934229, 22650860119442104,64622859204336398690105709, 37417737354038427535937949715303251763909, 10839565003114573305286763426362520300989660289144\ 540301999534964] |