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| n | a(n) |
|---|---|
| 4 | 1 |
| 5 | 7 |
| 6 | 26 |
| 7 | 73 |
| 8 | 174 |
| 9 | 373 |
| 10 | 743 |
| 11 | 1404 |
| 12 | 2552 |
| 13 | 4506 |
| 14 | 7784 |
| 15 | 13226 |
| 16 | 22193 |
| 17 | 36889 |
| 18 | 60882 |
| 19 | 99947 |
| 20 | 163430 |
| 21 | 266455 |
| 22 | 433495 |
| 23 | 704150 |
| 24 | 1142496 |
| 25 | 1852212 |
| 26 | 3001056 |
| 27 | 4860468 |
| 28 | 7869649 |
| 29 | 12739243 |
| 30 | 20619098 |
| 31 | 33369709 |
| 32 | 54001422 |
| 33 | 87385081 |
[1,7,26,73,174,373,743,1404,2552,4506,7784,13226, 22193,36889,60882,99947,163430,266455,433495, 704150,1142496,1852212,3001056,4860468,7869649, 12739243,20619098,33369709,54001422,87385081] |