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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 181 |
| 3 | 38081 |
| 4 | 14526601 |
| 5 | 8943235489 |
| 6 | 8138661470941 |
| 7 | 10287228590683393 |
| 8 | 17254778510170993681 |
| 9 | 37095265466946847758401 |
| 10 | 99474891266913130060486021 |
| 11 | 325534304813775692747248543681 |
| 12 | 1276941308627620432293188401109401 |
| 13 | 5914558735952850788377566338591400673 |
[1,1,181,38081,14526601,8943235489,8138661470941, 10287228590683393,17254778510170993681, 37095265466946847758401, 99474891266913130060486021, 325534304813775692747248543681, 1276941308627620432293188401109401, 5914558735952850788377566338591400673] |