| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 3 |
| 7 | 1 |
| 8 | 4 |
| 9 | 18 |
| 10 | 30 |
| 11 | 24 |
| 12 | 15 |
| 13 | 6 |
| 14 | 1 |
| 15 | 5 |
| 16 | 40 |
| 17 | 135 |
| 18 | 250 |
| 19 | 295 |
| 20 | 282 |
| 21 | 215 |
| 22 | 120 |
| 23 | 45 |
| 24 | 10 |
| 25 | 1 |
| 26 | 6 |
| 27 | 75 |
| 28 | 420 |
| 29 | 1385 |
| 30 | 3015 |
| 31 | 4800 |
| 32 | 6365 |
| 33 | 7170 |
| 34 | 6705 |
| 35 | 5065 |
| 36 | 3009 |
| 37 | 1365 |
| 38 | 455 |
| 39 | 105 |
| 40 | 15 |
| 41 | 1 |
| 42 | 7 |
| 43 | 126 |
| 44 | 1050 |
| 45 | 5355 |
| 46 | 18690 |
| 47 | 47880 |
| 48 | 96796 |
| 49 | 166890 |
| 50 | 251370 |
| 51 | 329945 |
| 52 | 373947 |
| 53 | 362292 |
| 54 | 297115 |
[1,2,1,3,6,3,1,4,18,30,24,15,6,1,5,40,135,250,295, 282,215,120,45,10,1,6,75,420,1385,3015,4800,6365, 7170,6705,5065,3009,1365,455,105,15,1,7,126,1050, 5355,18690,47880,96796,166890,251370,329945, 373947,362292,297115] |