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| n | a(n) |
|---|---|
| 1 | 261 |
| 2 | 252097 |
| 3 | 394241389 |
| 4 | 699094613961 |
| 5 | 1279198648576981 |
| 6 | 2359070696262035857 |
| 7 | 4359072407628680510589 |
| 8 | 8058606466810736529591961 |
| 9 | 14899753037585810536219347301 |
| 10 | 27549360802535095584399290453217 |
[261,252097,394241389,699094613961, 1279198648576981,2359070696262035857, 4359072407628680510589,8058606466810736529591961, 14899753037585810536219347301, 27549360802535095584399290453217] |