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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 11 |
| 8 | 23 |
| 9 | 47 |
| 10 | 103 |
| 11 | 226 |
| 12 | 518 |
| 13 | 1200 |
| 14 | 2867 |
| 15 | 6946 |
| 16 | 17234 |
| 17 | 43393 |
| 18 | 111419 |
| 19 | 290242 |
| 20 | 768901 |
| 21 | 2065172 |
| 22 | 5630083 |
| 23 | 15549403 |
| 24 | 43527487 |
| 25 | 123343911 |
| 26 | 353864422 |
| 27 | 1026935904 |
| 28 | 3014535166 |
| 29 | 8945274505 |
| 30 | 26829206798 |
| 31 | 81293234754 |
| 32 | 248805520401 |
| 33 | 768882019073 |
| 34 | 2398686176048 |
| 35 | 7552071250781 |
[1,0,1,1,2,3,6,11,23,47,103,226,518,1200,2867, 6946,17234,43393,111419,290242,768901,2065172, 5630083,15549403,43527487,123343911,353864422, 1026935904,3014535166,8945274505,26829206798, 81293234754,248805520401,768882019073, 2398686176048,7552071250781] |