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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 17 |
| 2 | 195 |
| 3 | 1885 |
| 4 | 16571 |
| 5 | 137277 |
| 6 | 1092715 |
| 7 | 8456045 |
| 8 | 64100091 |
| 9 | 478409437 |
| 10 | 3528167435 |
| 11 | 25777174605 |
| 12 | 186937014811 |
| 13 | 1347606967997 |
| 14 | 9667804397355 |
| 15 | 69083038251565 |
| 16 | 492036007548731 |
| 17 | 3494997671436957 |
| 18 | 24769526131110475 |
[1,17,195,1885,16571,137277,1092715,8456045, 64100091,478409437,3528167435,25777174605, 186937014811,1347606967997,9667804397355, 69083038251565,492036007548731,3494997671436957, 24769526131110475] |