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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 6 |
| 8 | 10 |
| 9 | 20 |
| 10 | 36 |
| 11 | 71 |
| 12 | 136 |
| 13 | 270 |
| 14 | 531 |
| 15 | 1070 |
| 16 | 2147 |
| 17 | 4367 |
| 18 | 8895 |
| 19 | 18262 |
| 20 | 37588 |
| 21 | 77795 |
| 22 | 161444 |
| 23 | 336383 |
| 24 | 702732 |
| 25 | 1472582 |
| 26 | 3093151 |
| 27 | 6513402 |
| 28 | 13744384 |
| 29 | 29063588 |
| 30 | 61570853 |
| 31 | 130669978 |
| 32 | 277767990 |
| 33 | 591373581 |
| 34 | 1260855164 |
[0,0,0,1,1,2,3,6,10,20,36,71,136,270,531,1070, 2147,4367,8895,18262,37588,77795,161444,336383, 702732,1472582,3093151,6513402,13744384,29063588, 61570853,130669978,277767990,591373581,1260855164] |