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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 13 |
| 6 | 29 |
| 7 | 149 |
| 8 | 217 |
| 9 | 449 |
| 10 | 855 |
| 11 | 1578 |
| 12 | 2834 |
| 13 | 5445 |
| 14 | 9425 |
| 15 | 17054 |
| 16 | 30095 |
| 17 | 53610 |
| 18 | 94905 |
| 19 | 170505 |
| 20 | 300335 |
| 21 | 532606 |
| 22 | 942870 |
| 23 | 1669907 |
| 24 | 2957734 |
| 25 | 5236935 |
| 26 | 9271871 |
| 27 | 16416945 |
| 28 | 29066281 |
| 29 | 51463071 |
| 30 | 91587523 |
| 31 | 161792680 |
| 32 | 286563514 |
| 33 | 507342270 |
[1,1,2,5,13,29,149,217,449,855,1578,2834,5445, 9425,17054,30095,53610,94905,170505,300335,532606, 942870,1669907,2957734,5236935,9271871,16416945, 29066281,51463071,91587523,161792680,286563514, 507342270] |