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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 961 |
| 3 | 2449 |
| 4 | 6241 |
| 5 | 88243 |
| 6 | 1247689 |
| 7 | 4799749 |
| 8 | 18464209 |
| 9 | 184732327 |
| 10 | 1848226081 |
| 11 | 8873643337 |
| 12 | 42603849649 |
| 13 | 355158126283 |
| 14 | 2960701807561 |
| 15 | 16146759616669 |
| 16 | 88059474768001 |
| 17 | 662598445609375 |
| 18 | 4985683837890625 |
| 19 | 29297113012890625 |
[31,961,2449,6241,88243,1247689,4799749,18464209, 184732327,1848226081,8873643337,42603849649, 355158126283,2960701807561,16146759616669, 88059474768001,662598445609375,4985683837890625, 29297113012890625] |