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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 14 |
| 5 | 28 |
| 6 | 52 |
| 7 | 104 |
| 8 | 202 |
| 9 | 402 |
| 10 | 794 |
| 11 | 1588 |
| 12 | 3152 |
| 13 | 6304 |
| 14 | 12572 |
| 15 | 25136 |
| 16 | 50198 |
| 17 | 100396 |
| 18 | 200636 |
| 19 | 401272 |
| 20 | 802260 |
| 21 | 1604488 |
| 22 | 3208416 |
| 23 | 6416832 |
| 24 | 12832482 |
| 25 | 25664962 |
| 26 | 51327702 |
| 27 | 102655278 |
| 28 | 205306104 |
| 29 | 410612208 |
| 30 | 821215304 |
| 31 | 1642430608 |
| 32 | 3284843468 |
[2,4,8,14,28,52,104,202,402,794,1588,3152,6304, 12572,25136,50198,100396,200636,401272,802260, 1604488,3208416,6416832,12832482,25664962, 51327702,102655278,205306104,410612208,821215304, 1642430608,3284843468] |