| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 5 |
| 6 | 13 |
| 7 | 29 |
| 8 | 48 |
| 9 | 114 |
| 10 | 301 |
| 11 | 579 |
| 12 | 1462 |
| 13 | 4198 |
| 14 | 9295 |
| 15 | 24184 |
| 16 | 73489 |
| 17 | 179879 |
| 18 | 488616 |
| 19 | 1540939 |
| 20 | 4086226 |
| 21 | 11540851 |
| 22 | 37515163 |
| 23 | 106101932 |
| 24 | 311122047 |
| 25 | 1037973223 |
| 26 | 3097496100 |
| 27 | 9407708340 |
| 28 | 32130072122 |
| 29 | 100356356885 |
| 30 | 314999307749 |
| 31 | 1099302983248 |
| 32 | 3571869566808 |
[1,1,2,4,5,13,29,48,114,301,579,1462,4198,9295, 24184,73489,179879,488616,1540939,4086226, 11540851,37515163,106101932,311122047,1037973223, 3097496100,9407708340,32130072122,100356356885, 314999307749,1099302983248,3571869566808] |