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| n | a(n) |
|---|---|
| 1 | 8688 |
| 2 | 36224 |
| 3 | 154647 |
| 4 | 663395 |
| 5 | 2837837 |
| 6 | 12043599 |
| 7 | 50455611 |
| 8 | 212162746 |
| 9 | 895579480 |
| 10 | 3787247400 |
| 11 | 16020690930 |
| 12 | 67729965951 |
| 13 | 286080148023 |
| 14 | 1208022059263 |
| 15 | 5102043513434 |
| 16 | 21553426093066 |
| 17 | 91062071731465 |
| 18 | 384728908620213 |
[8688,36224,154647,663395,2837837,12043599, 50455611,212162746,895579480,3787247400, 16020690930,67729965951,286080148023, 1208022059263,5102043513434,21553426093066, 91062071731465,384728908620213] |