| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 2 |
| 7 | 4 |
| 8 | 6 |
| 9 | 10 |
| 10 | 17 |
| 11 | 29 |
| 12 | 51 |
| 13 | 89 |
| 14 | 159 |
| 15 | 284 |
| 16 | 512 |
| 17 | 930 |
| 18 | 1692 |
| 19 | 3101 |
| 20 | 5698 |
| 21 | 10515 |
| 22 | 19464 |
| 23 | 36143 |
| 24 | 67296 |
| 25 | 125622 |
| 26 | 235050 |
| 27 | 440756 |
| 28 | 828142 |
| 29 | 1558955 |
| 30 | 2939761 |
| 31 | 5552744 |
| 32 | 10504222 |
| 33 | 19899760 |
| 34 | 37750091 |
| 35 | 71704061 |
| 36 | 136361602 |
| 37 | 259618770 |
| 38 | 494821629 |
| 39 | 944074665 |
[1,1,1,1,2,2,4,6,10,17,29,51,89,159,284,512,930, 1692,3101,5698,10515,19464,36143,67296,125622, 235050,440756,828142,1558955,2939761,5552744, 10504222,19899760,37750091,71704061,136361602, 259618770,494821629,944074665] |