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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 8 |
| 6 | 10 |
| 7 | 145 |
| 8 | 319 |
| 9 | 620 |
| 10 | 629 |
| 11 | 1165 |
| 12 | 5897 |
| 13 | 8797 |
| 14 | 10138 |
| 15 | 10897 |
| 16 | 13438 |
| 17 | 21863 |
| 18 | 23089 |
| 19 | 27400 |
| 20 | 51079 |
| 21 | 182000 |
[1,2,4,5,8,10,145,319,620,629,1165,5897,8797, 10138,10897,13438,21863,23089,27400,51079,182000] |