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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 31 |
| 4 | 211 |
| 5 | 2311 |
| 6 | 43891 |
| 7 | 1272811 |
| 8 | 16546531 |
| 9 | 976245271 |
| 10 | 36121074991 |
| 11 | 1119753324691 |
| 12 | 52628406260431 |
| 13 | 3526103219448811 |
| 14 | 186883470630786931 |
| 15 | 7662222295862264131 |
| 16 | 743235562698639620611 |
| 17 | 54256196077000692304531 |
| 18 | 6130950156701078230411891 |
| 19 | 631487866140211057732424671 |
[3,7,31,211,2311,43891,1272811,16546531,976245271, 36121074991,1119753324691,52628406260431, 3526103219448811,186883470630786931, 7662222295862264131,743235562698639620611, 54256196077000692304531,6130950156701078230411891, 631487866140211057732424671] |