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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 56 |
| 3 | 1107 |
| 4 | 27692 |
| 5 | 657057 |
| 6 | 15710423 |
| 7 | 374768765 |
| 8 | 8941472101 |
| 9 | 213311448213 |
| 10 | 5088790842383 |
| 11 | 121398147914074 |
| 12 | 2896070141473471 |
| 13 | 69088508450973319 |
| 14 | 1648171881846136308 |
| 15 | 39318701071705330022 |
| 16 | 937984835115874609118 |
[0,56,1107,27692,657057,15710423,374768765, 8941472101,213311448213,5088790842383, 121398147914074,2896070141473471, 69088508450973319,1648171881846136308, 39318701071705330022,937984835115874609118] |