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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 4 |
| 8 | 2 |
| 9 | 4 |
| 10 | 12 |
| 11 | 8 |
| 12 | 22 |
| 13 | 14 |
| 14 | 36 |
| 15 | 44 |
| 16 | 62 |
| 17 | 114 |
| 18 | 130 |
| 19 | 206 |
| 20 | 264 |
| 21 | 414 |
| 22 | 602 |
| 23 | 822 |
| 24 | 1250 |
| 25 | 1672 |
| 26 | 2520 |
| 27 | 3518 |
| 28 | 5146 |
| 29 | 7408 |
| 30 | 10448 |
| 31 | 15224 |
| 32 | 21496 |
| 33 | 31284 |
| 34 | 44718 |
| 35 | 64170 |
| 36 | 92314 |
| 37 | 131618 |
| 38 | 190084 |
| 39 | 271870 |
| 40 | 391188 |
| 41 | 560978 |
| 42 | 804264 |
| 43 | 1155976 |
| 44 | 1656428 |
| 45 | 2381306 |
| 46 | 3414846 |
[1,0,0,0,0,2,0,4,2,4,12,8,22,14,36,44,62,114,130, 206,264,414,602,822,1250,1672,2520,3518,5146,7408, 10448,15224,21496,31284,44718,64170,92314,131618, 190084,271870,391188,560978,804264,1155976, 1656428,2381306,3414846] |