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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 2 |
| 7 | 7 |
| 8 | 10 |
| 9 | 26 |
| 10 | 38 |
| 11 | 79 |
| 12 | 127 |
| 13 | 261 |
| 14 | 452 |
| 15 | 877 |
| 16 | 1540 |
| 17 | 2916 |
| 18 | 5244 |
| 19 | 9837 |
| 20 | 17853 |
| 21 | 33159 |
| 22 | 60486 |
| 23 | 111923 |
| 24 | 204974 |
| 25 | 378334 |
| 26 | 694018 |
| 27 | 1278939 |
| 28 | 2348795 |
| 29 | 4325129 |
| 30 | 7948424 |
| 31 | 14628953 |
| 32 | 26893256 |
| 33 | 49482888 |
| 34 | 90987448 |
| 35 | 167388697 |
| 36 | 307825273 |
[0,0,1,1,3,2,7,10,26,38,79,127,261,452,877,1540, 2916,5244,9837,17853,33159,60486,111923,204974, 378334,694018,1278939,2348795,4325129,7948424, 14628953,26893256,49482888,90987448,167388697, 307825273] |