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| n | a(n) |
|---|---|
| 1 | 159 |
| 2 | 895 |
| 3 | 2047 |
| 4 | 4607 |
| 5 | 10239 |
| 6 | 49151 |
| 7 | 4718591 |
| 8 | 20971519 |
| 9 | 838860799 |
| 10 | 137438953471 |
| 11 | 5085241278463 |
| 12 | 21440476741631 |
| 13 | 340010386766614455386111 |
| 14 | 96714065569170333976494079 |
| 15 | 3288278229351791355200798719 |
| 16 | 111414603535684224740921180159 |
| 17 | 15370263527767281493147526365183 |
[159,895,2047,4607,10239,49151,4718591,20971519, 838860799,137438953471,5085241278463, 21440476741631,340010386766614455386111, 96714065569170333976494079, 3288278229351791355200798719, 111414603535684224740921180159, 15370263527767281493147526365183] |