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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 2 |
| 4 | 9 |
| 5 | 41 |
| 6 | 6 |
| 7 | 26 |
| 8 | 113 |
| 9 | 493 |
| 10 | 24 |
| 11 | 102 |
| 12 | 434 |
| 13 | 1849 |
| 14 | 7889 |
| 15 | 120 |
| 16 | 504 |
| 17 | 2118 |
| 18 | 8906 |
| 19 | 37473 |
| 20 | 157781 |
| 21 | 720 |
| 22 | 3000 |
| 23 | 12504 |
| 24 | 52134 |
| 25 | 217442 |
| 26 | 907241 |
| 27 | 3786745 |
| 28 | 5040 |
| 29 | 20880 |
| 30 | 86520 |
| 31 | 358584 |
| 32 | 1486470 |
| 33 | 6163322 |
| 34 | 25560529 |
| 35 | 106028861 |
| 36 | 40320 |
| 37 | 166320 |
| 38 | 686160 |
| 39 | 2831160 |
| 40 | 11683224 |
| 41 | 48219366 |
| 42 | 199040786 |
| 43 | 821723673 |
| 44 | 3392923553 |
[1,1,5,2,9,41,6,26,113,493,24,102,434,1849,7889, 120,504,2118,8906,37473,157781,720,3000,12504, 52134,217442,907241,3786745,5040,20880,86520, 358584,1486470,6163322,25560529,106028861,40320, 166320,686160,2831160,11683224,48219366,199040786, 821723673,3392923553] |