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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 8 |
| 4 | 50 |
| 5 | 58 |
| 6 | 358 |
| 7 | 416 |
| 8 | 2564 |
| 9 | 2980 |
| 10 | 18364 |
| 11 | 21344 |
| 12 | 131528 |
| 13 | 152872 |
| 14 | 942040 |
| 15 | 1094912 |
| 16 | 6747152 |
| 17 | 7842064 |
| 18 | 48324976 |
| 19 | 56167040 |
| 20 | 346116896 |
| 21 | 402283936 |
| 22 | 2478985312 |
| 23 | 2881269248 |
| 24 | 17755181120 |
| 25 | 20636450368 |
| 26 | 127167537088 |
| 27 | 147803987456 |
| 28 | 910809209984 |
| 29 | 1058613197440 |
[1,7,8,50,58,358,416,2564,2980,18364,21344,131528, 152872,942040,1094912,6747152,7842064,48324976, 56167040,346116896,402283936,2478985312, 2881269248,17755181120,20636450368,127167537088, 147803987456,910809209984,1058613197440] |