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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 23 |
| 4 | 61 |
| 5 | 185 |
| 6 | 562 |
| 7 | 1677 |
| 8 | 4998 |
| 9 | 14968 |
| 10 | 44818 |
| 11 | 134061 |
| 12 | 401123 |
| 13 | 1200360 |
| 14 | 3591843 |
| 15 | 10747770 |
| 16 | 32160619 |
| 17 | 96234620 |
| 18 | 287963368 |
| 19 | 861674203 |
| 20 | 2578393448 |
| 21 | 7715343389 |
| 22 | 23086669802 |
| 23 | 69082386936 |
| 24 | 206715662599 |
| 25 | 618556579000 |
| 26 | 1850910743566 |
[1,8,23,61,185,562,1677,4998,14968,44818,134061, 401123,1200360,3591843,10747770,32160619,96234620, 287963368,861674203,2578393448,7715343389, 23086669802,69082386936,206715662599,618556579000, 1850910743566] |