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| n | a(n) |
|---|---|
| 1 | 904 |
| 2 | 2864 |
| 3 | 8688 |
| 4 | 24032 |
| 5 | 57912 |
| 6 | 156416 |
| 7 | 442144 |
| 8 | 1235840 |
| 9 | 3295784 |
| 10 | 8902160 |
| 11 | 24576568 |
| 12 | 68205968 |
| 13 | 186882480 |
| 14 | 511124496 |
| 15 | 1407327072 |
| 16 | 3893357456 |
| 17 | 10747255576 |
| 18 | 29617387520 |
| 19 | 81753189024 |
| 20 | 226221330256 |
| 21 | 626221254528 |
| 22 | 1732751390816 |
[904,2864,8688,24032,57912,156416,442144,1235840, 3295784,8902160,24576568,68205968,186882480, 511124496,1407327072,3893357456,10747255576, 29617387520,81753189024,226221330256,626221254528, 1732751390816] |