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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 16 |
| 2 | 513 |
| 3 | 8224 |
| 4 | 263681 |
| 5 | 4227120 |
| 6 | 135531521 |
| 7 | 2172731456 |
| 8 | 69662938113 |
| 9 | 1116779741264 |
| 10 | 35806614658561 |
| 11 | 574022614278240 |
| 12 | 18404530271562241 |
| 13 | 295046506959274096 |
| 14 | 9459892752968333313 |
| 15 | 151653330554452607104 |
| 16 | 4862366470495451760641 |
| 17 | 77949516858481680777360 |
[1,16,513,8224,263681,4227120,135531521, 2172731456,69662938113,1116779741264, 35806614658561,574022614278240,18404530271562241, 295046506959274096,9459892752968333313, 151653330554452607104,4862366470495451760641, 77949516858481680777360] |