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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 34 |
| 3 | 410 |
| 4 | 6170 |
| 5 | 109506 |
| 6 | 2227882 |
| 7 | 50987378 |
| 8 | 1293386410 |
| 9 | 35933906946 |
| 10 | 1083069266634 |
| 11 | 35146231883122 |
| 12 | 1220316225699786 |
| 13 | 45099576850647106 |
| 14 | 1766204747811044266 |
| 15 | 73012853049788936050 |
| 16 | 3175271515525778312810 |
[1,4,34,410,6170,109506,2227882,50987378, 1293386410,35933906946,1083069266634, 35146231883122,1220316225699786,45099576850647106, 1766204747811044266,73012853049788936050, 3175271515525778312810] |