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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 2 |
| 7 | 2 |
| 8 | 4 |
| 9 | 0 |
| 10 | 2 |
| 11 | 4 |
| 12 | 4 |
| 13 | 0 |
| 14 | 30 |
| 15 | 46 |
| 16 | 78 |
| 17 | 0 |
| 18 | 210 |
| 19 | 366 |
| 20 | 644 |
| 21 | 0 |
| 22 | 2032 |
| 23 | 3696 |
| 24 | 6694 |
| 25 | 0 |
| 26 | 21936 |
| 27 | 39886 |
| 28 | 73098 |
| 29 | 0 |
| 30 | 246172 |
| 31 | 454074 |
| 32 | 841714 |
| 33 | 0 |
| 34 | 2899542 |
| 35 | 5401222 |
| 36 | 10073398 |
| 37 | 0 |
| 38 | 35282910 |
| 39 | 66213604 |
| 40 | 124427582 |
| 41 | 0 |
| 42 | 441326270 |
| 43 | 832775792 |
| 44 | 1573861942 |
| 45 | 0 |
| 46 | 5642205488 |
[1,0,0,0,0,0,2,2,4,0,2,4,4,0,30,46,78,0,210,366, 644,0,2032,3696,6694,0,21936,39886,73098,0,246172, 454074,841714,0,2899542,5401222,10073398,0, 35282910,66213604,124427582,0,441326270,832775792, 1573861942,0,5642205488] |