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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 148 |
| 4 | 2669 |
| 5 | 62056 |
| 6 | 1777927 |
| 7 | 60692920 |
| 8 | 2408692505 |
| 9 | 109074596320 |
| 10 | 5553702114731 |
| 11 | 314208715035304 |
| 12 | 19561795753879909 |
| 13 | 1329317730339826384 |
| 14 | 97924919301787209647 |
| 15 | 7773978186375852940696 |
| 16 | 661702605336795904770353 |
| 17 | 60119367618216155944350400 |
[1,1,11,148,2669,62056,1777927,60692920, 2408692505,109074596320,5553702114731, 314208715035304,19561795753879909, 1329317730339826384,97924919301787209647, 7773978186375852940696,661702605336795904770353, 60119367618216155944350400] |