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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 16 |
| 2 | 20 |
| 3 | 21 |
| 4 | 22 |
| 5 | 24 |
| 6 | 32 |
| 7 | 64 |
| 8 | 107 |
| 9 | 193 |
| 10 | 364 |
| 11 | 664 |
| 12 | 1264 |
| 13 | 2421 |
| 14 | 4649 |
| 15 | 8934 |
| 16 | 17504 |
| 17 | 34344 |
| 18 | 67424 |
| 19 | 132427 |
| 20 | 260205 |
[0,16,20,21,22,24,32,64,107,193,364,664,1264,2421, 4649,8934,17504,34344,67424,132427,260205] |