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| n | a(n) |
|---|---|
| 1 | 56 |
| 2 | 116 |
| 3 | 3227 |
| 4 | 52704 |
| 5 | 840315 |
| 6 | 12642165 |
| 7 | 186308295 |
| 8 | 2698382566 |
| 9 | 37993752219 |
| 10 | 515096792943 |
| 11 | 6705513923385 |
| 12 | 84047907114772 |
[56,116,3227,52704,840315,12642165,186308295, 2698382566,37993752219,515096792943,6705513923385, 84047907114772] |