| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 16796 |
| 2 | 15737865 |
| 3 | 574221648 |
| 4 | 7766844470 |
| 5 | 60610884906 |
| 6 | 331670995656 |
| 7 | 1414591812920 |
| 8 | 5014392953273 |
| 9 | 15408077648040 |
| 10 | 42254306265171 |
| 11 | 105611585968616 |
| 12 | 244384627765200 |
| 13 | 529868222188998 |
| 14 | 1086607184873210 |
| 15 | 2123449623259536 |
| 16 | 3978448975695051 |
| 17 | 7182177974166580 |
[0,16796,15737865,574221648,7766844470, 60610884906,331670995656,1414591812920, 5014392953273,15408077648040,42254306265171, 105611585968616,244384627765200,529868222188998, 1086607184873210,2123449623259536, 3978448975695051,7182177974166580] |