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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 9 |
| 6 | 16 |
| 7 | 33 |
| 8 | 62 |
| 9 | 113 |
| 10 | 205 |
| 11 | 373 |
| 12 | 664 |
| 13 | 1190 |
| 14 | 2113 |
| 15 | 3744 |
| 16 | 6618 |
| 17 | 11683 |
| 18 | 20564 |
| 19 | 36164 |
| 20 | 63489 |
| 21 | 111343 |
| 22 | 195042 |
| 23 | 341357 |
| 24 | 596892 |
| 25 | 1042976 |
| 26 | 1821179 |
| 27 | 3178145 |
| 28 | 5543173 |
| 29 | 9663545 |
| 30 | 16839321 |
| 31 | 29332231 |
| 32 | 51075576 |
| 33 | 88908912 |
| 34 | 154722756 |
| 35 | 269186074 |
| 36 | 468221264 |
[0,0,1,1,4,9,16,33,62,113,205,373,664,1190,2113, 3744,6618,11683,20564,36164,63489,111343,195042, 341357,596892,1042976,1821179,3178145,5543173, 9663545,16839321,29332231,51075576,88908912, 154722756,269186074,468221264] |