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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 32 |
| 5 | 96 |
| 6 | 448 |
| 7 | 2944 |
| 8 | 15104 |
| 9 | 160768 |
| 10 | 1565696 |
| 11 | 16812032 |
| 12 | 341250048 |
| 13 | 5081473024 |
| 14 | 128940408832 |
| 15 | 4153114198016 |
| 16 | 110562817540096 |
| 17 | 6199850375708672 |
| 18 | 294499013825921024 |
| 19 | 17095312584100282368 |
| 20 | 1743063839902067064832 |
[1,2,4,8,32,96,448,2944,15104,160768,1565696, 16812032,341250048,5081473024,128940408832, 4153114198016,110562817540096,6199850375708672, 294499013825921024,17095312584100282368, 1743063839902067064832] |