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| n | a(n) |
|---|---|
| 1 | 21553018 |
| 2 | 72721157625 |
| 3 | 245114118899485 |
| 4 | 826125782084148708 |
| 5 | 2784331051704024117237 |
| 6 | 9384142308556191112974969 |
| 7 | 31627738616791159166366474706 |
| 8 | 106596185653227343496197522538691 |
[21553018,72721157625,245114118899485, 826125782084148708,2784331051704024117237, 9384142308556191112974969, 31627738616791159166366474706, 106596185653227343496197522538691] |