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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 9 |
| 6 | 11 |
| 7 | 12 |
| 8 | 38 |
| 9 | 47 |
| 10 | 53 |
| 11 | 63 |
| 12 | 81 |
| 13 | 146 |
| 14 | 147 |
| 15 | 359 |
| 16 | 398 |
| 17 | 1637 |
| 18 | 1875 |
| 19 | 2145 |
| 20 | 2193 |
| 21 | 15788 |
| 22 | 23073 |
| 23 | 38465 |
| 24 | 68399 |
[0,2,4,5,9,11,12,38,47,53,63,81,146,147,359,398, 1637,1875,2145,2193,15788,23073,38465,68399] |