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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 4 |
| 3 | 7 |
| 4 | 10 |
| 5 | 12 |
| 6 | 18 |
| 7 | 25 |
| 8 | 30 |
| 9 | 36 |
| 10 | 48 |
| 11 | 54 |
| 12 | 58 |
| 13 | 59 |
| 14 | 60 |
| 15 | 61 |
| 16 | 62 |
| 17 | 63 |
| 18 | 64 |
| 19 | 65 |
| 20 | 66 |
| 21 | 67 |
| 22 | 68 |
| 23 | 69 |
| 24 | 70 |
| 25 | 71 |
| 26 | 80 |
| 27 | 86 |
[0,2,4,7,10,12,18,25,30,36,48,54,58,59,60,61,62, 63,64,65,66,67,68,69,70,71,80,86] |