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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 64 |
| 3 | 168 |
| 4 | 603 |
| 5 | 1612 |
| 6 | 3952 |
| 7 | 11452 |
| 8 | 32021 |
| 9 | 84300 |
| 10 | 231616 |
| 11 | 641775 |
| 12 | 1736910 |
| 13 | 4732822 |
| 14 | 12996466 |
| 15 | 35450695 |
| 16 | 96651608 |
| 17 | 264382416 |
| 18 | 722256895 |
| 19 | 1971272340 |
| 20 | 5385783204 |
| 21 | 14714016328 |
| 22 | 40180554949 |
| 23 | 109749174712 |
| 24 | 299799902720 |
| 25 | 818831131779 |
[8,64,168,603,1612,3952,11452,32021,84300,231616, 641775,1736910,4732822,12996466,35450695,96651608, 264382416,722256895,1971272340,5385783204, 14714016328,40180554949,109749174712,299799902720, 818831131779] |