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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 418 |
| 3 | 8940 |
| 4 | 170596 |
| 5 | 2953268 |
| 6 | 47578884 |
| 7 | 723952524 |
| 8 | 10511594736 |
| 9 | 147010714764 |
| 10 | 1991930366642 |
| 11 | 26287414292840 |
| 12 | 339219557133945 |
| 13 | 4293634757761535 |
| 14 | 53448756094555559 |
| 15 | 655687863052989235 |
| 16 | 7941160613884038234 |
[16,418,8940,170596,2953268,47578884,723952524, 10511594736,147010714764,1991930366642, 26287414292840,339219557133945,4293634757761535, 53448756094555559,655687863052989235, 7941160613884038234] |