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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 225 |
| 4 | 3727 |
| 5 | 65120 |
| 6 | 1158334 |
| 7 | 20726079 |
| 8 | 371568349 |
| 9 | 6665506622 |
| 10 | 119595908140 |
| 11 | 2145992981277 |
| 12 | 38507882245867 |
| 13 | 690993582249116 |
| 14 | 12399363162575962 |
| 15 | 222497465035339899 |
| 16 | 3992554551056534713 |
| 17 | 71643481793789018234 |
[2,16,225,3727,65120,1158334,20726079,371568349, 6665506622,119595908140,2145992981277, 38507882245867,690993582249116,12399363162575962, 222497465035339899,3992554551056534713, 71643481793789018234] |