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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 19 |
| 7 | 41 |
| 8 | 86 |
| 9 | 182 |
| 10 | 376 |
| 11 | 776 |
| 12 | 1579 |
| 13 | 3205 |
| 14 | 6442 |
| 15 | 12899 |
| 16 | 25651 |
| 17 | 50793 |
| 18 | 100016 |
| 19 | 196121 |
| 20 | 382719 |
| 21 | 743834 |
| 22 | 1439437 |
| 23 | 2774670 |
| 24 | 5327167 |
| 25 | 10189508 |
| 26 | 19416774 |
| 27 | 36866735 |
| 28 | 69748768 |
| 29 | 131500273 |
| 30 | 247070451 |
| 31 | 462647957 |
| 32 | 863441265 |
| 33 | 1606169377 |
[1,1,1,2,4,9,19,41,86,182,376,776,1579,3205,6442, 12899,25651,50793,100016,196121,382719,743834, 1439437,2774670,5327167,10189508,19416774, 36866735,69748768,131500273,247070451,462647957, 863441265,1606169377] |