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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 1 |
| 5 | 15 |
| 6 | 9 |
| 7 | 52 |
| 8 | 68 |
| 9 | 203 |
| 10 | 507 |
| 11 | 10 |
| 12 | 877 |
| 13 | 3918 |
| 14 | 245 |
| 15 | 4140 |
| 16 | 32057 |
| 17 | 4123 |
| 18 | 21147 |
| 19 | 280700 |
| 20 | 60753 |
| 21 | 280 |
| 22 | 115975 |
| 23 | 2645611 |
| 24 | 853914 |
| 25 | 13300 |
| 26 | 678570 |
| 27 | 26917867 |
| 28 | 11923428 |
| 29 | 396935 |
| 30 | 4213597 |
| 31 | 295934526 |
| 32 | 169127222 |
| 33 | 9710855 |
| 34 | 15400 |
| 35 | 27644437 |
| 36 | 3513447546 |
| 37 | 2469452843 |
| 38 | 215274774 |
| 39 | 1201200 |
[1,1,2,5,1,15,9,52,68,203,507,10,877,3918,245, 4140,32057,4123,21147,280700,60753,280,115975, 2645611,853914,13300,678570,26917867,11923428, 396935,4213597,295934526,169127222,9710855,15400, 27644437,3513447546,2469452843,215274774,1201200] |