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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 12 |
| 6 | 23 |
| 7 | 42 |
| 8 | 81 |
| 9 | 150 |
| 10 | 284 |
| 11 | 534 |
| 12 | 1004 |
| 13 | 1882 |
| 14 | 3532 |
| 15 | 6630 |
| 16 | 12459 |
| 17 | 23406 |
| 18 | 43951 |
| 19 | 82537 |
| 20 | 154998 |
| 21 | 291087 |
| 22 | 546673 |
| 23 | 1026686 |
| 24 | 1928117 |
| 25 | 3621016 |
| 26 | 6800299 |
| 27 | 12771085 |
| 28 | 23984328 |
| 29 | 45042958 |
| 30 | 84591338 |
| 31 | 158863806 |
| 32 | 298348612 |
| 33 | 560303341 |
| 34 | 1052258401 |
| 35 | 1976157509 |
[1,1,1,3,6,12,23,42,81,150,284,534,1004,1882,3532, 6630,12459,23406,43951,82537,154998,291087,546673, 1026686,1928117,3621016,6800299,12771085,23984328, 45042958,84591338,158863806,298348612,560303341, 1052258401,1976157509] |