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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 13 |
| 4 | 6 |
| 5 | 50 |
| 6 | 373 |
| 7 | 24 |
| 8 | 246 |
| 9 | 2210 |
| 10 | 20533 |
| 11 | 120 |
| 12 | 1464 |
| 13 | 15366 |
| 14 | 163490 |
| 15 | 1834933 |
| 16 | 720 |
| 17 | 10200 |
| 18 | 122424 |
| 19 | 1466886 |
| 20 | 18307490 |
| 21 | 241335733 |
| 22 | 5040 |
| 23 | 81360 |
| 24 | 1098840 |
| 25 | 14637624 |
| 26 | 201050886 |
| 27 | 2892317090 |
| 28 | 43830481333 |
| 29 | 40320 |
| 30 | 730800 |
| 31 | 10967760 |
| 32 | 160766040 |
[1,2,13,6,50,373,24,246,2210,20533,120,1464,15366, 163490,1834933,720,10200,122424,1466886,18307490, 241335733,5040,81360,1098840,14637624,201050886, 2892317090,43830481333,40320,730800,10967760, 160766040] |