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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 10 |
| 7 | 27 |
| 8 | 49 |
| 9 | 98 |
| 10 | 267 |
| 11 | 485 |
| 12 | 970 |
| 13 | 2643 |
| 14 | 4801 |
| 15 | 9602 |
| 16 | 26163 |
| 17 | 47525 |
| 18 | 95050 |
| 19 | 258987 |
| 20 | 470449 |
| 21 | 940898 |
| 22 | 2563707 |
| 23 | 4656965 |
| 24 | 9313930 |
| 25 | 25378083 |
| 26 | 46099201 |
| 27 | 92198402 |
| 28 | 251217123 |
| 29 | 456335045 |
| 30 | 912670090 |
| 31 | 2486793147 |
| 32 | 4517251249 |
| 33 | 9034502498 |
| 34 | 24616714347 |
[0,1,2,3,5,10,27,49,98,267,485,970,2643,4801,9602, 26163,47525,95050,258987,470449,940898,2563707, 4656965,9313930,25378083,46099201,92198402, 251217123,456335045,912670090,2486793147, 4517251249,9034502498,24616714347] |