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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 17 |
| 7 | 39 |
| 8 | 89 |
| 9 | 211 |
| 10 | 507 |
| 11 | 1238 |
| 12 | 3057 |
| 13 | 7639 |
| 14 | 19241 |
| 15 | 48865 |
| 16 | 124906 |
| 17 | 321198 |
| 18 | 830219 |
| 19 | 2156010 |
| 20 | 5622109 |
| 21 | 14715813 |
| 22 | 38649152 |
| 23 | 101821927 |
| 24 | 269010485 |
| 25 | 712566567 |
| 26 | 1891993344 |
| 27 | 5034704828 |
| 28 | 13425117806 |
| 29 | 35866550869 |
| 30 | 95991365288 |
| 31 | 257332864506 |
| 32 | 690928354105 |
[1,1,1,2,4,8,17,39,89,211,507,1238,3057,7639, 19241,48865,124906,321198,830219,2156010,5622109, 14715813,38649152,101821927,269010485,712566567, 1891993344,5034704828,13425117806,35866550869, 95991365288,257332864506,690928354105] |