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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 1 |
| 5 | 1 |
| 6 | 8 |
| 7 | 24 |
| 8 | 30 |
| 9 | 20 |
| 10 | 7 |
| 11 | 1 |
| 12 | 1 |
| 13 | 15 |
| 14 | 99 |
| 15 | 368 |
| 16 | 841 |
| 17 | 1302 |
| 18 | 1435 |
| 19 | 1149 |
| 20 | 668 |
| 21 | 276 |
| 22 | 77 |
| 23 | 13 |
| 24 | 1 |
| 25 | 1 |
| 26 | 24 |
| 27 | 268 |
| 28 | 1828 |
| 29 | 8446 |
| 30 | 28050 |
| 31 | 70378 |
| 32 | 138204 |
| 33 | 217525 |
| 34 | 278663 |
| 35 | 293217 |
| 36 | 254462 |
| 37 | 182077 |
| 38 | 106926 |
| 39 | 51053 |
| 40 | 19515 |
| 41 | 5831 |
| 42 | 1312 |
| 43 | 209 |
| 44 | 21 |
| 45 | 1 |
| 46 | 1 |
| 47 | 35 |
| 48 | 585 |
| 49 | 6180 |
| 50 | 46080 |
| 51 | 257302 |
| 52 | 1119568 |
| 53 | 3916826 |
| 54 | 11290146 |
[1,1,3,1,1,8,24,30,20,7,1,1,15,99,368,841,1302, 1435,1149,668,276,77,13,1,1,24,268,1828,8446, 28050,70378,138204,217525,278663,293217,254462, 182077,106926,51053,19515,5831,1312,209,21,1,1,35, 585,6180,46080,257302,1119568,3916826,11290146] |