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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 14 |
| 4 | 84 |
| 5 | 196 |
| 6 | 1176 |
| 7 | 2744 |
| 8 | 16464 |
| 9 | 38416 |
| 10 | 230496 |
| 11 | 537824 |
| 12 | 3226944 |
| 13 | 7529536 |
| 14 | 45177216 |
| 15 | 105413504 |
| 16 | 632481024 |
| 17 | 1475789056 |
| 18 | 8854734336 |
| 19 | 20661046784 |
[1,6,14,84,196,1176,2744,16464,38416,230496, 537824,3226944,7529536,45177216,105413504, 632481024,1475789056,8854734336,20661046784] |