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| n | a(n) |
|---|---|
| 1 | 422 |
| 2 | 3196 |
| 3 | 24542 |
| 4 | 187530 |
| 5 | 1453304 |
| 6 | 11315108 |
| 7 | 88657470 |
| 8 | 697548282 |
| 9 | 5508571400 |
| 10 | 43635932538 |
| 11 | 346582563516 |
| 12 | 2759102483488 |
| 13 | 22009380252406 |
| 14 | 175882840702296 |
| 15 | 1407766935222636 |
| 16 | 11283861015674038 |
| 17 | 90561415687714086 |
| 18 | 727670172922068894 |
[422,3196,24542,187530,1453304,11315108,88657470, 697548282,5508571400,43635932538,346582563516, 2759102483488,22009380252406,175882840702296, 1407766935222636,11283861015674038, 90561415687714086,727670172922068894] |