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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 8 |
| 6 | 14 |
| 7 | 23 |
| 8 | 63 |
| 9 | 107 |
| 10 | 132 |
| 11 | 428 |
| 12 | 530 |
| 13 | 1137 |
| 14 | 1973 |
| 15 | 2000 |
| 16 | 7064 |
| 17 | 20747 |
| 18 | 79574 |
| 19 | 113570 |
| 20 | 293912 |
| 21 | 1993191 |
[1,2,3,5,8,14,23,63,107,132,428,530,1137,1973, 2000,7064,20747,79574,113570,293912,1993191] |