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| n | a(n) |
|---|---|
| 1 | 598 |
| 2 | 2290 |
| 3 | 10302 |
| 4 | 44612 |
| 5 | 188690 |
| 6 | 800946 |
| 7 | 3410622 |
| 8 | 14539062 |
| 9 | 61939050 |
| 10 | 263654268 |
| 11 | 1122558622 |
| 12 | 4780929292 |
| 13 | 20360099218 |
| 14 | 86698049792 |
| 15 | 369189620402 |
| 16 | 1572170465338 |
| 17 | 6694947958226 |
| 18 | 28509673198118 |
| 19 | 121405330624712 |
[598,2290,10302,44612,188690,800946,3410622, 14539062,61939050,263654268,1122558622,4780929292, 20360099218,86698049792,369189620402, 1572170465338,6694947958226,28509673198118, 121405330624712] |