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| n | a(n) |
|---|---|
| 1 | 160 |
| 2 | 760 |
| 3 | 3456 |
| 4 | 16572 |
| 5 | 76032 |
| 6 | 365024 |
| 7 | 1676576 |
| 8 | 8050184 |
| 9 | 36980544 |
| 10 | 177566656 |
| 11 | 815714624 |
| 12 | 3916758000 |
| 13 | 17993056384 |
| 14 | 86395956032 |
| 15 | 396891522944 |
| 16 | 1905725225888 |
| 17 | 8754648687872 |
| 18 | 42036560942336 |
| 19 | 193110382571776 |
| 20 | 927244100524992 |
[160,760,3456,16572,76032,365024,1676576,8050184, 36980544,177566656,815714624,3916758000, 17993056384,86395956032,396891522944, 1905725225888,8754648687872,42036560942336, 193110382571776,927244100524992] |