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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 5 |
| 7 | 5 |
| 8 | 14 |
| 9 | 15 |
| 10 | 5 |
| 11 | 42 |
| 12 | 49 |
| 13 | 21 |
| 14 | 132 |
| 15 | 168 |
| 16 | 84 |
| 17 | 14 |
| 18 | 429 |
| 19 | 594 |
| 20 | 336 |
| 21 | 84 |
| 22 | 1430 |
| 23 | 2145 |
| 24 | 1350 |
| 25 | 420 |
| 26 | 42 |
| 27 | 4862 |
| 28 | 7865 |
| 29 | 5445 |
| 30 | 1980 |
| 31 | 330 |
| 32 | 16796 |
| 33 | 29172 |
| 34 | 22022 |
| 35 | 9075 |
| 36 | 1980 |
| 37 | 132 |
| 38 | 58786 |
| 39 | 109174 |
| 40 | 89232 |
| 41 | 40898 |
| 42 | 10725 |
| 43 | 1287 |
| 44 | 208012 |
| 45 | 411502 |
| 46 | 361998 |
| 47 | 182182 |
| 48 | 55055 |
| 49 | 9009 |
| 50 | 429 |
| 51 | 742900 |
| 52 | 1560090 |
| 53 | 1469650 |
| 54 | 804440 |
| 55 | 273273 |
| 56 | 55055 |
| 57 | 5005 |
[1,1,2,2,5,5,14,15,5,42,49,21,132,168,84,14,429, 594,336,84,1430,2145,1350,420,42,4862,7865,5445, 1980,330,16796,29172,22022,9075,1980,132,58786, 109174,89232,40898,10725,1287,208012,411502, 361998,182182,55055,9009,429,742900,1560090, 1469650,804440,273273,55055,5005] |