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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 15 |
| 4 | 35 |
| 5 | 79 |
| 6 | 176 |
| 7 | 395 |
| 8 | 883 |
| 9 | 1976 |
| 10 | 4419 |
| 11 | 9882 |
| 12 | 22097 |
| 13 | 49410 |
| 14 | 110485 |
| 15 | 247052 |
| 16 | 552427 |
| 17 | 1235264 |
| 18 | 2762135 |
| 19 | 6176323 |
| 20 | 13810679 |
| 21 | 30881617 |
| 22 | 69053396 |
| 23 | 154408088 |
| 24 | 345266983 |
| 25 | 772040444 |
| 26 | 1726334915 |
| 27 | 3860202221 |
| 28 | 8631674575 |
| 29 | 19301011109 |
| 30 | 43158372875 |
| 31 | 96505055547 |
| 32 | 215791864375 |
| 33 | 482525277735 |
[1,3,7,15,35,79,176,395,883,1976,4419,9882,22097, 49410,110485,247052,552427,1235264,2762135, 6176323,13810679,30881617,69053396,154408088, 345266983,772040444,1726334915,3860202221, 8631674575,19301011109,43158372875,96505055547, 215791864375,482525277735] |