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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 29 |
| 4 | 148 |
| 5 | 865 |
| 6 | 5481 |
| 7 | 35891 |
| 8 | 240290 |
| 9 | 1642093 |
| 10 | 11426333 |
| 11 | 80724482 |
| 12 | 577729923 |
| 13 | 4182253815 |
| 14 | 30591920071 |
| 15 | 225940210520 |
| 16 | 1684083322944 |
| 17 | 12665316644764 |
| 18 | 96106894379213 |
| 19 | 736020834061010 |
| 20 | 5691806197738505 |
| 21 | 44482817526595550 |
| 22 | 351740903195391707 |
| 23 | 2818488652963003522 |
| 24 | 22931501032724375064 |
[1,1,6,29,148,865,5481,35891,240290,1642093, 11426333,80724482,577729923,4182253815, 30591920071,225940210520,1684083322944, 12665316644764,96106894379213,736020834061010, 5691806197738505,44482817526595550, 351740903195391707,2818488652963003522, 22931501032724375064] |