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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 1 |
| 7 | 3 |
| 8 | 9 |
| 9 | 30 |
| 10 | 1 |
| 11 | 4 |
| 12 | 15 |
| 13 | 69 |
| 14 | 335 |
| 15 | 1 |
| 16 | 5 |
| 17 | 22 |
| 18 | 118 |
| 19 | 769 |
| 20 | 4984 |
| 21 | 1 |
| 22 | 6 |
| 23 | 30 |
| 24 | 178 |
| 25 | 1317 |
| 26 | 11346 |
| 27 | 92652 |
| 28 | 1 |
| 29 | 7 |
| 30 | 39 |
| 31 | 250 |
| 32 | 1995 |
| 33 | 19311 |
| 34 | 208914 |
| 35 | 2065146 |
| 36 | 1 |
| 37 | 8 |
| 38 | 49 |
| 39 | 335 |
| 40 | 2820 |
| 41 | 29126 |
| 42 | 352636 |
| 43 | 4613976 |
| 44 | 53636520 |
| 45 | 1 |
| 46 | 9 |
| 47 | 60 |
| 48 | 434 |
| 49 | 3810 |
| 50 | 41061 |
| 51 | 528097 |
| 52 | 7722840 |
| 53 | 118840164 |
[1,1,1,1,2,4,1,3,9,30,1,4,15,69,335,1,5,22,118, 769,4984,1,6,30,178,1317,11346,92652,1,7,39,250, 1995,19311,208914,2065146,1,8,49,335,2820,29126, 352636,4613976,53636520,1,9,60,434,3810,41061, 528097,7722840,118840164] |