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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 14 |
| 6 | 25 |
| 7 | 29 |
| 8 | 54 |
| 9 | 60 |
| 10 | 62 |
| 11 | 3445 |
| 12 | 108995 |
| 13 | 3625182 |
| 14 | 13951972 |
| 15 | 28010901 |
| 16 | 7165572247 |
| 17 | 14335792539 |
| 18 | 114636743486 |
| 19 | 229264368709 |
| 20 | 458534096494 |
[0,2,5,12,14,25,29,54,60,62,3445,108995,3625182, 13951972,28010901,7165572247,14335792539, 114636743486,229264368709,458534096494] |