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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 22 |
| 5 | 48 |
| 6 | 90 |
| 7 | 179 |
| 8 | 323 |
| 9 | 611 |
| 10 | 1132 |
| 11 | 1975 |
| 12 | 3572 |
| 13 | 6389 |
| 14 | 10947 |
| 15 | 19309 |
| 16 | 32839 |
| 17 | 57315 |
| 18 | 99502 |
| 19 | 167762 |
| 20 | 289155 |
| 21 | 485573 |
| 22 | 832041 |
| 23 | 1421295 |
| 24 | 2374728 |
| 25 | 4038808 |
| 26 | 6852739 |
| 27 | 11405775 |
| 28 | 19286971 |
| 29 | 32039014 |
| 30 | 54018522 |
| 31 | 90928382 |
| 32 | 150649790 |
| 33 | 252983945 |
| 34 | 424266973 |
| 35 | 701408734 |
[1,4,9,22,48,90,179,323,611,1132,1975,3572,6389, 10947,19309,32839,57315,99502,167762,289155, 485573,832041,1421295,2374728,4038808,6852739, 11405775,19286971,32039014,54018522,90928382, 150649790,252983945,424266973,701408734] |