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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 9 |
| 4 | 128 |
| 5 | 625 |
| 6 | 15552 |
| 7 | 117649 |
| 8 | 8388608 |
| 9 | 129140163 |
| 10 | 2000000000 |
| 11 | 25937424601 |
| 12 | 2972033482752 |
| 13 | 23298085122481 |
| 14 | 1587429546508288 |
| 15 | 29192926025390625 |
| 16 | 9223372036854775808 |
| 17 | 48661191875666868481 |
| 18 | 13115469358432179191808 |
[1,2,9,128,625,15552,117649,8388608,129140163, 2000000000,25937424601,2972033482752, 23298085122481,1587429546508288,29192926025390625, 9223372036854775808,48661191875666868481, 13115469358432179191808] |