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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 71 |
| 3 | 1036 |
| 4 | 16850 |
| 5 | 292974 |
| 6 | 5330003 |
| 7 | 100198252 |
| 8 | 1930974350 |
| 9 | 37944361084 |
| 10 | 757400034534 |
| 11 | 15314501499440 |
| 12 | 313016784476500 |
| 13 | 6456745853475198 |
| 14 | 134240505281434443 |
| 15 | 2810148747648315484 |
| 16 | 59181433880505401750 |
| 17 | 1252997327856618663540 |
[1,6,71,1036,16850,292974,5330003,100198252, 1930974350,37944361084,757400034534, 15314501499440,313016784476500,6456745853475198, 134240505281434443,2810148747648315484, 59181433880505401750,1252997327856618663540] |