| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 11 |
| 6 | 19 |
| 7 | 41 |
| 8 | 97 |
| 9 | 272 |
| 10 | 448 |
| 11 | 899 |
| 12 | 1813 |
| 13 | 3704 |
| 14 | 7759 |
| 15 | 16883 |
| 16 | 39712 |
| 17 | 111377 |
| 18 | 183043 |
| 19 | 366089 |
| 20 | 732193 |
| 21 | 1464464 |
| 22 | 2929279 |
| 23 | 5859923 |
| 24 | 11725792 |
| 25 | 23483537 |
| 26 | 47110405 |
| 27 | 94769960 |
| 28 | 191737006 |
| 29 | 392270525 |
| 30 | 819925663 |
| 31 | 1784477927 |
| 32 | 4197144511 |
[1,1,1,4,11,19,41,97,272,448,899,1813,3704,7759, 16883,39712,111377,183043,366089,732193,1464464, 2929279,5859923,11725792,23483537,47110405, 94769960,191737006,392270525,819925663,1784477927, 4197144511] |