| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 9 |
| 7 | 17 |
| 8 | 34 |
| 9 | 71 |
| 10 | 153 |
| 11 | 337 |
| 12 | 755 |
| 13 | 1713 |
| 14 | 3925 |
| 15 | 9064 |
| 16 | 21065 |
| 17 | 49213 |
| 18 | 115477 |
| 19 | 271961 |
| 20 | 642495 |
| 21 | 1521899 |
| 22 | 3613189 |
| 23 | 8595037 |
| 24 | 20480600 |
| 25 | 48874131 |
| 26 | 116781789 |
| 27 | 279358063 |
| 28 | 668925263 |
| 29 | 1603145325 |
| 30 | 3845056065 |
| 31 | 9228442541 |
| 32 | 22162387821 |
[1,1,2,3,5,9,17,34,71,153,337,755,1713,3925,9064, 21065,49213,115477,271961,642495,1521899,3613189, 8595037,20480600,48874131,116781789,279358063, 668925263,1603145325,3845056065,9228442541, 22162387821] |