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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 35 |
| 3 | 147 |
| 4 | 574 |
| 5 | 2114 |
| 6 | 7504 |
| 7 | 26050 |
| 8 | 88627 |
| 9 | 296989 |
| 10 | 985303 |
| 11 | 3236269 |
| 12 | 10543598 |
| 13 | 34156986 |
| 14 | 109995484 |
| 15 | 352428398 |
| 16 | 1125103059 |
| 17 | 3577593997 |
| 18 | 11336743971 |
| 19 | 35833521825 |
| 20 | 112944171696 |
| 21 | 355097604934 |
| 22 | 1114357838268 |
| 23 | 3489662154182 |
[7,35,147,574,2114,7504,26050,88627,296989,985303, 3236269,10543598,34156986,109995484,352428398, 1125103059,3577593997,11336743971,35833521825, 112944171696,355097604934,1114357838268, 3489662154182] |