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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 10 |
| 4 | 23 |
| 5 | 43 |
| 6 | 97 |
| 7 | 183 |
| 8 | 387 |
| 9 | 761 |
| 10 | 1525 |
| 11 | 3070 |
| 12 | 6109 |
| 13 | 12331 |
| 14 | 24570 |
| 15 | 49119 |
| 16 | 98308 |
| 17 | 196634 |
| 18 | 393229 |
| 19 | 786794 |
| 20 | 1573225 |
[2,5,10,23,43,97,183,387,761,1525,3070,6109,12331, 24570,49119,98308,196634,393229,786794,1573225] |