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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 6 |
| 2 | 34 |
| 3 | 83 |
| 4 | 769 |
| 5 | 3170 |
| 6 | 36784 |
| 7 | 36784 |
| 8 | 3330956 |
| 9 | 26390160 |
| 10 | 187804588 |
| 11 | 470279837 |
| 12 | 470279837 |
| 13 | 83518003043 |
| 14 | 180407013450 |
| 15 | 180407013450 |
| 16 | 23918214563165 |
| 17 | 90384075702367 |
| 18 | 1020906131651195 |
| 19 | 7534560523292991 |
| 20 | 53130141264785563 |
| 21 | 212714673860009565 |
| 22 | 1888352266109861586 |
[0,6,34,83,769,3170,36784,36784,3330956,26390160, 187804588,470279837,470279837,83518003043, 180407013450,180407013450,23918214563165, 90384075702367,1020906131651195,7534560523292991, 53130141264785563,212714673860009565, 1888352266109861586] |