| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 58 |
| 7 | 112 |
| 8 | 217 |
| 9 | 421 |
| 10 | 816 |
| 11 | 1585 |
| 12 | 3080 |
| 13 | 5992 |
| 14 | 11659 |
| 15 | 22699 |
| 16 | 44216 |
| 17 | 86184 |
| 18 | 168077 |
| 19 | 327950 |
| 20 | 640215 |
| 21 | 1250448 |
| 22 | 2443588 |
| 23 | 4777546 |
| 24 | 9345262 |
| 25 | 18288744 |
| 26 | 35807979 |
| 27 | 70141603 |
| 28 | 137457160 |
| 29 | 269494966 |
| 30 | 528593347 |
| 31 | 1037233938 |
| 32 | 2036159747 |
| 33 | 3998739426 |
[1,2,4,8,16,30,58,112,217,421,816,1585,3080,5992, 11659,22699,44216,86184,168077,327950,640215, 1250448,2443588,4777546,9345262,18288744,35807979, 70141603,137457160,269494966,528593347,1037233938, 2036159747,3998739426] |