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| n | a(n) |
|---|---|
| 1 | 48 |
| 2 | 90 |
| 3 | 172 |
| 4 | 334 |
| 5 | 656 |
| 6 | 1300 |
| 7 | 2584 |
| 8 | 5148 |
| 9 | 10272 |
| 10 | 20520 |
| 11 | 41008 |
| 12 | 81976 |
| 13 | 163904 |
| 14 | 327760 |
| 15 | 655456 |
| 16 | 1310832 |
| 17 | 2621568 |
| 18 | 5243040 |
| 19 | 10485952 |
| 20 | 20971744 |
| 21 | 41943296 |
| 22 | 83886400 |
| 23 | 167772544 |
| 24 | 335544768 |
| 25 | 671089152 |
| 26 | 1342177920 |
| 27 | 2684355328 |
| 28 | 5368710016 |
[48,90,172,334,656,1300,2584,5148,10272,20520, 41008,81976,163904,327760,655456,1310832,2621568, 5243040,10485952,20971744,41943296,83886400, 167772544,335544768,671089152,1342177920, 2684355328,5368710016] |