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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 7 |
| 4 | 26 |
| 5 | 49 |
| 6 | 85 |
| 7 | 178 |
| 8 | 348 |
| 9 | 683 |
| 10 | 1349 |
| 11 | 2688 |
| 12 | 5319 |
| 13 | 10498 |
| 14 | 20818 |
| 15 | 41206 |
| 16 | 81574 |
| 17 | 161646 |
| 18 | 320215 |
| 19 | 634294 |
| 20 | 1256481 |
| 21 | 2489029 |
| 22 | 4930656 |
| 23 | 9767642 |
| 24 | 19350237 |
| 25 | 38333645 |
| 26 | 75940498 |
| 27 | 150441579 |
| 28 | 298031468 |
| 29 | 590414638 |
| 30 | 1169642000 |
| 31 | 2317123308 |
| 32 | 4590345948 |
[4,8,7,26,49,85,178,348,683,1349,2688,5319,10498, 20818,41206,81574,161646,320215,634294,1256481, 2489029,4930656,9767642,19350237,38333645, 75940498,150441579,298031468,590414638,1169642000, 2317123308,4590345948] |