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| n | a(n) |
|---|---|
| 1 | 258 |
| 2 | 844 |
| 3 | 3264 |
| 4 | 11792 |
| 5 | 41125 |
| 6 | 146033 |
| 7 | 518500 |
| 8 | 1829248 |
| 9 | 6456790 |
| 10 | 22804970 |
| 11 | 80487561 |
| 12 | 284029242 |
| 13 | 1002372834 |
| 14 | 3537239577 |
| 15 | 12482044458 |
| 16 | 44046176233 |
| 17 | 155426964450 |
| 18 | 548457225605 |
| 19 | 1935348475463 |
| 20 | 6829275410361 |
| 21 | 24098489355181 |
[258,844,3264,11792,41125,146033,518500,1829248, 6456790,22804970,80487561,284029242,1002372834, 3537239577,12482044458,44046176233,155426964450, 548457225605,1935348475463,6829275410361, 24098489355181] |