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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 27 |
| 6 | 76 |
| 7 | 177 |
| 8 | 428 |
| 9 | 966 |
| 10 | 2724 |
| 11 | 5986 |
| 12 | 14322 |
| 13 | 31241 |
| 14 | 68632 |
| 15 | 174364 |
| 16 | 374901 |
| 17 | 841417 |
| 18 | 1792950 |
| 19 | 3803764 |
| 20 | 7688426 |
| 21 | 18376432 |
| 22 | 37158444 |
| 23 | 80078021 |
| 24 | 163155272 |
| 25 | 335521478 |
| 26 | 658661436 |
| 27 | 1298215354 |
| 28 | 2820956914 |
| 29 | 5523327097 |
| 30 | 11240000648 |
| 31 | 22117134452 |
| 32 | 43666070406 |
[1,1,2,5,11,27,76,177,428,966,2724,5986,14322, 31241,68632,174364,374901,841417,1792950,3803764, 7688426,18376432,37158444,80078021,163155272, 335521478,658661436,1298215354,2820956914, 5523327097,11240000648,22117134452,43666070406] |