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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 4 |
| 6 | 6 |
| 7 | 4 |
| 8 | 5 |
| 9 | 32 |
| 10 | 112 |
| 11 | 224 |
| 12 | 302 |
| 13 | 488 |
| 14 | 1564 |
| 15 | 4872 |
| 16 | 11034 |
| 17 | 19664 |
| 18 | 37128 |
| 19 | 95824 |
| 20 | 266659 |
| 21 | 635740 |
| 22 | 1306682 |
| 23 | 2706524 |
| 24 | 6503711 |
| 25 | 16794992 |
| 26 | 40634744 |
| 27 | 90066416 |
| 28 | 197648134 |
| 29 | 465436936 |
| 30 | 1152867388 |
| 31 | 2790870536 |
| 32 | 6434526866 |
| 33 | 14640368240 |
| 34 | 34415925816 |
| 35 | 83509570992 |
[1,0,0,0,1,4,6,4,5,32,112,224,302,488,1564,4872, 11034,19664,37128,95824,266659,635740,1306682, 2706524,6503711,16794992,40634744,90066416, 197648134,465436936,1152867388,2790870536, 6434526866,14640368240,34415925816,83509570992] |