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| n | a(n) |
|---|---|
| 0 | 11 |
| 1 | 81 |
| 2 | 641 |
| 3 | 5121 |
| 4 | 40961 |
| 5 | 327681 |
| 6 | 2621441 |
| 7 | 20971521 |
| 8 | 167772161 |
| 9 | 1342177281 |
| 10 | 10737418241 |
| 11 | 85899345921 |
| 12 | 687194767361 |
| 13 | 5497558138881 |
| 14 | 43980465111041 |
| 15 | 351843720888321 |
| 16 | 2814749767106561 |
| 17 | 22517998136852481 |
| 18 | 180143985094819841 |
[11,81,641,5121,40961,327681,2621441,20971521, 167772161,1342177281,10737418241,85899345921, 687194767361,5497558138881,43980465111041, 351843720888321,2814749767106561, 22517998136852481,180143985094819841] |