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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 48 |
| 3 | 415 |
| 4 | 1774 |
| 5 | 12214 |
| 6 | 60904 |
| 7 | 378611 |
| 8 | 2026447 |
| 9 | 12017015 |
| 10 | 66465945 |
| 11 | 385592382 |
| 12 | 2165486783 |
| 13 | 12434785358 |
| 14 | 70330789227 |
| 15 | 401931843469 |
| 16 | 2280829145222 |
| 17 | 13005603168706 |
| 18 | 73915930618863 |
| 19 | 421040013595102 |
| 20 | 2394648017238224 |
[16,48,415,1774,12214,60904,378611,2026447, 12017015,66465945,385592382,2165486783, 12434785358,70330789227,401931843469, 2280829145222,13005603168706,73915930618863, 421040013595102,2394648017238224] |