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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 16 |
| 5 | 37 |
| 6 | 85 |
| 7 | 191 |
| 8 | 418 |
| 9 | 893 |
| 10 | 1871 |
| 11 | 3863 |
| 12 | 7892 |
| 13 | 16005 |
| 14 | 32297 |
| 15 | 64959 |
| 16 | 130374 |
| 17 | 261309 |
| 18 | 523299 |
| 19 | 1047415 |
| 20 | 2095800 |
| 21 | 4192741 |
| 22 | 8386813 |
| 23 | 16775167 |
| 24 | 33552106 |
| 25 | 67106237 |
| 26 | 134214775 |
| 27 | 268432151 |
| 28 | 536867228 |
| 29 | 1073737733 |
| 30 | 2147479121 |
| 31 | 4294962303 |
| 32 | 8589929102 |
| 33 | 17179863165 |
[1,3,7,16,37,85,191,418,893,1871,3863,7892,16005, 32297,64959,130374,261309,523299,1047415,2095800, 4192741,8386813,16775167,33552106,67106237, 134214775,268432151,536867228,1073737733, 2147479121,4294962303,8589929102,17179863165] |