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| n | a(n) |
|---|---|
| 1 | 98 |
| 2 | 518 |
| 3 | 2792 |
| 4 | 15230 |
| 5 | 83290 |
| 6 | 456328 |
| 7 | 2500838 |
| 8 | 13709358 |
| 9 | 75155340 |
| 10 | 412023922 |
| 11 | 2258839434 |
| 12 | 12383734204 |
| 13 | 67891856922 |
| 14 | 372206825758 |
| 15 | 2040567205064 |
| 16 | 11187101456262 |
| 17 | 61331590903554 |
| 18 | 336241181497880 |
| 19 | 1843391459226238 |
[98,518,2792,15230,83290,456328,2500838,13709358, 75155340,412023922,2258839434,12383734204, 67891856922,372206825758,2040567205064, 11187101456262,61331590903554,336241181497880, 1843391459226238] |