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| n | a(n) |
|---|---|
| 1 | 7224 |
| 2 | 18966 |
| 3 | 50028 |
| 4 | 132054 |
| 5 | 348066 |
| 6 | 915064 |
| 7 | 2398187 |
| 8 | 6264519 |
| 9 | 16780283 |
| 10 | 44934437 |
| 11 | 120109652 |
| 12 | 320204464 |
| 13 | 851082289 |
| 14 | 2255459974 |
| 15 | 5963697251 |
| 16 | 15895712873 |
| 17 | 42426824580 |
| 18 | 113249519695 |
| 19 | 302038597433 |
| 20 | 804346238604 |
| 21 | 2138273636787 |
[7224,18966,50028,132054,348066,915064,2398187, 6264519,16780283,44934437,120109652,320204464, 851082289,2255459974,5963697251,15895712873, 42426824580,113249519695,302038597433, 804346238604,2138273636787] |