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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 7 |
| 3 | 178 |
| 4 | 3706 |
| 5 | 73267 |
| 6 | 1424745 |
| 7 | 27551817 |
| 8 | 531785885 |
| 9 | 10257442136 |
| 10 | 197807790635 |
| 11 | 3814292012327 |
| 12 | 73548334004184 |
| 13 | 1418168141939766 |
| 14 | 27345207646288006 |
| 15 | 527271440369708686 |
| 16 | 10166866164855156013 |
| 17 | 196037839679146009768 |
[0,7,178,3706,73267,1424745,27551817,531785885, 10257442136,197807790635,3814292012327, 73548334004184,1418168141939766,27345207646288006, 527271440369708686,10166866164855156013, 196037839679146009768] |