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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 538 |
| 3 | 16777216 |
| 4 | 35184378381312 |
| 5 | 4722366482869645213696 |
| 6 | 40564819207303347603293977182208 |
| 7 | 22300745198530623141535718272648361505980416 |
| 8 | 784637716923335095479473677930668862955643627524327473152 |
| 9 | 1766847064778384329583297500742918515827483896875618958121606201292619776 |
[1,538,16777216,35184378381312, 4722366482869645213696, 40564819207303347603293977182208, 22300745198530623141535718272648361505980416, 78463771692333509547947367793066886295564362752432\ 7473152, 17668470647783843295832975007429185158274838968756\ 18958121606201292619776] |