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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 144 |
| 3 | 1164 |
| 4 | 8496 |
| 5 | 65160 |
| 6 | 515560 |
| 7 | 4075336 |
| 8 | 32031600 |
| 9 | 251533888 |
| 10 | 1976926440 |
| 11 | 15543816656 |
| 12 | 122208548968 |
| 13 | 960755182696 |
| 14 | 7553047614920 |
| 15 | 59379727197728 |
| 16 | 466827426445200 |
| 17 | 3670067881137352 |
| 18 | 28853031765433504 |
| 19 | 226834374728410104 |
[12,144,1164,8496,65160,515560,4075336,32031600, 251533888,1976926440,15543816656,122208548968, 960755182696,7553047614920,59379727197728, 466827426445200,3670067881137352, 28853031765433504,226834374728410104] |