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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 6 |
| 5 | 4 |
| 6 | 20 |
| 7 | 16 |
| 8 | 71 |
| 9 | 64 |
| 10 | 2 |
| 11 | 262 |
| 12 | 261 |
| 13 | 20 |
| 14 | 994 |
| 15 | 1084 |
| 16 | 141 |
| 17 | 3852 |
| 18 | 4572 |
| 19 | 854 |
| 20 | 7 |
| 21 | 15183 |
| 22 | 19520 |
| 23 | 4772 |
| 24 | 112 |
| 25 | 60686 |
| 26 | 84139 |
| 27 | 25416 |
| 28 | 1128 |
| 29 | 245412 |
| 30 | 365404 |
| 31 | 131270 |
| 32 | 9120 |
| 33 | 30 |
| 34 | 1002344 |
| 35 | 1596420 |
| 36 | 664004 |
| 37 | 64790 |
| 38 | 660 |
| 39 | 4129012 |
| 40 | 7008544 |
| 41 | 3309336 |
| 42 | 422928 |
[1,1,2,1,6,4,20,16,71,64,2,262,261,20,994,1084, 141,3852,4572,854,7,15183,19520,4772,112,60686, 84139,25416,1128,245412,365404,131270,9120,30, 1002344,1596420,664004,64790,660,4129012,7008544, 3309336,422928] |