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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 3 |
| 4 | 28 |
| 5 | 31 |
| 6 | 112 |
| 7 | 15 |
| 8 | 368 |
| 9 | 191 |
| 10 | 1856 |
| 11 | 1279 |
| 12 | 5888 |
| 13 | 3839 |
| 14 | 29696 |
| 15 | 28415 |
| 16 | 118016 |
| 17 | 99327 |
| 18 | 474112 |
| 19 | 270335 |
| 20 | 1323008 |
| 21 | 544767 |
| 22 | 7385088 |
| 23 | 6307839 |
| 24 | 29786112 |
| 25 | 18661375 |
| 26 | 88686592 |
| 27 | 46333951 |
| 28 | 410320896 |
| 29 | 430637055 |
| 30 | 1841561600 |
| 31 | 1519583231 |
| 32 | 7356350464 |
| 33 | 6057885695 |
[1,1,6,3,28,31,112,15,368,191,1856,1279,5888,3839, 29696,28415,118016,99327,474112,270335,1323008, 544767,7385088,6307839,29786112,18661375,88686592, 46333951,410320896,430637055,1841561600, 1519583231,7356350464,6057885695] |