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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 10 |
| 3 | 14 |
| 4 | 16 |
| 5 | 26 |
| 6 | 50 |
| 7 | 56 |
| 8 | 70 |
| 9 | 116 |
| 10 | 2072 |
| 11 | 6250 |
| 12 | 13670 |
| 13 | 14216 |
| 14 | 14626 |
| 15 | 396128 |
[4,10,14,16,26,50,56,70,116,2072,6250,13670,14216, 14626,396128] |