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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 64 |
| 3 | 187 |
| 4 | 643 |
| 5 | 1737 |
| 6 | 7461 |
| 7 | 24946 |
| 8 | 78667 |
| 9 | 313003 |
| 10 | 946740 |
| 11 | 3353070 |
| 12 | 11758390 |
| 13 | 36733281 |
| 14 | 134840254 |
| 15 | 447239565 |
| 16 | 1494320065 |
| 17 | 5328884020 |
| 18 | 17359223415 |
| 19 | 60336682303 |
| 20 | 207461258909 |
| 21 | 687759739866 |
| 22 | 2406912915998 |
| 23 | 8088972710842 |
[24,64,187,643,1737,7461,24946,78667,313003, 946740,3353070,11758390,36733281,134840254, 447239565,1494320065,5328884020,17359223415, 60336682303,207461258909,687759739866, 2406912915998,8088972710842] |