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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 16 |
| 4 | 28 |
| 5 | 40 |
| 6 | 52 |
| 7 | 80 |
| 8 | 148 |
| 9 | 328 |
| 10 | 8464 |
| 11 | 11704 |
| 12 | 52372 |
| 13 | 60172 |
| 14 | 675232 |
| 15 | 692692 |
| 16 | 921484 |
[4,8,16,28,40,52,80,148,328,8464,11704,52372, 60172,675232,692692,921484] |