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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 25 |
| 5 | 59 |
| 6 | 123 |
| 7 | 219 |
| 8 | 411 |
| 9 | 955 |
| 10 | 1979 |
| 11 | 3515 |
| 12 | 6587 |
| 13 | 15291 |
| 14 | 31675 |
| 15 | 56251 |
| 16 | 105403 |
| 17 | 244667 |
| 18 | 506811 |
| 19 | 900027 |
| 20 | 1686459 |
| 21 | 3914683 |
| 22 | 8108987 |
| 23 | 14400443 |
| 24 | 26983355 |
| 25 | 62634939 |
| 26 | 129743803 |
| 27 | 230407099 |
| 28 | 431733691 |
| 29 | 1002159035 |
| 30 | 2075900859 |
| 31 | 3686513595 |
| 32 | 6907739067 |
[1,3,7,13,25,59,123,219,411,955,1979,3515,6587, 15291,31675,56251,105403,244667,506811,900027, 1686459,3914683,8108987,14400443,26983355, 62634939,129743803,230407099,431733691,1002159035, 2075900859,3686513595,6907739067] |