| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 16 |
| 2 | 271 |
| 3 | 3803 |
| 4 | 48982 |
| 5 | 610484 |
| 6 | 7245905 |
| 7 | 83484450 |
| 8 | 942636916 |
| 9 | 10487584405 |
| 10 | 115369529592 |
| 11 | 1257761617574 |
| 12 | 13611696080735 |
| 13 | 146406754329933 |
| 14 | 1566562183907264 |
| 15 | 16687323842873339 |
| 16 | 177063766685219106 |
| 17 | 1872323812397478246 |
| 18 | 19738266145121133639 |
| 19 | 207517446542560214799 |
| 20 | 2176390177056541482871 |
| 21 | 22774922890367225576581 |
[1,16,271,3803,48982,610484,7245905,83484450, 942636916,10487584405,115369529592,1257761617574, 13611696080735,146406754329933,1566562183907264, 16687323842873339,177063766685219106, 1872323812397478246,19738266145121133639, 207517446542560214799,2176390177056541482871, 22774922890367225576581] |