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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 58 |
| 7 | 114 |
| 8 | 220 |
| 9 | 428 |
| 10 | 832 |
| 11 | 1622 |
| 12 | 3160 |
| 13 | 6158 |
| 14 | 12016 |
| 15 | 23450 |
| 16 | 45796 |
| 17 | 89472 |
| 18 | 174900 |
| 19 | 342064 |
| 20 | 669300 |
| 21 | 1310232 |
| 22 | 2566084 |
| 23 | 5027970 |
| 24 | 9856108 |
| 25 | 19328880 |
| 26 | 37922144 |
| 27 | 74431898 |
| 28 | 146151140 |
| 29 | 287089844 |
| 30 | 564160036 |
| 31 | 1109051474 |
| 32 | 2181032428 |
| 33 | 4290716264 |
[1,2,4,8,16,30,58,114,220,428,832,1622,3160,6158, 12016,23450,45796,89472,174900,342064,669300, 1310232,2566084,5027970,9856108,19328880,37922144, 74431898,146151140,287089844,564160036,1109051474, 2181032428,4290716264] |