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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 16 |
| 2 | 200 |
| 3 | 2248 |
| 4 | 23816 |
| 5 | 243016 |
| 6 | 2416520 |
| 7 | 23583688 |
| 8 | 226933256 |
| 9 | 2159839816 |
| 10 | 20378082440 |
| 11 | 190918934728 |
| 12 | 1778399954696 |
| 13 | 16486635929416 |
| 14 | 152228014061960 |
| 15 | 1400838452135368 |
| 16 | 12853836673840136 |
| 17 | 117654854901535816 |
| 18 | 1074656292809619080 |
| 19 | 9798007424852945608 |
[1,16,200,2248,23816,243016,2416520,23583688, 226933256,2159839816,20378082440,190918934728, 1778399954696,16486635929416,152228014061960, 1400838452135368,12853836673840136, 117654854901535816,1074656292809619080, 9798007424852945608] |