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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 6 |
| 2 | 46 |
| 3 | 522 |
| 4 | 7970 |
| 5 | 152166 |
| 6 | 3487246 |
| 7 | 93241002 |
| 8 | 2849229890 |
| 9 | 97949265606 |
| 10 | 3741386059246 |
| 11 | 157201459863882 |
| 12 | 7205584123783010 |
| 13 | 357802951084619046 |
| 14 | 19133892392367261646 |
| 15 | 1096291279711115037162 |
| 16 | 67000387673723462963330 |
| 17 | 4350684698032741048452486 |
| 18 | 299131045427247559446422446 |
[2,6,46,522,7970,152166,3487246,93241002, 2849229890,97949265606,3741386059246, 157201459863882,7205584123783010, 357802951084619046,19133892392367261646, 1096291279711115037162,67000387673723462963330, 4350684698032741048452486, 299131045427247559446422446] |