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| n | a(n) |
|---|---|
| 0 | 84 |
| 1 | 354 |
| 2 | 1674 |
| 3 | 8178 |
| 4 | 39858 |
| 5 | 191250 |
| 6 | 900498 |
| 7 | 4164114 |
| 8 | 18952722 |
| 9 | 85106706 |
| 10 | 377862162 |
| 11 | 1661755410 |
| 12 | 7249502226 |
| 13 | 31410683922 |
| 14 | 135299432466 |
| 15 | 579837493266 |
| 16 | 2473936945170 |
| 17 | 10514155438098 |
| 18 | 44530379784210 |
| 19 | 188016821796882 |
| 20 | 791649070350354 |
[84,354,1674,8178,39858,191250,900498,4164114, 18952722,85106706,377862162,1661755410,7249502226, 31410683922,135299432466,579837493266, 2473936945170,10514155438098,44530379784210, 188016821796882,791649070350354] |