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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 23 |
| 5 | 1 |
| 6 | 109 |
| 7 | 11 |
| 8 | 619 |
| 9 | 101 |
| 10 | 4108 |
| 11 | 932 |
| 12 | 31240 |
| 13 | 8975 |
| 14 | 105 |
| 15 | 268028 |
| 16 | 91387 |
| 17 | 3465 |
| 18 | 2562156 |
| 19 | 991674 |
| 20 | 74970 |
| 21 | 27011016 |
| 22 | 11514394 |
| 23 | 1391390 |
| 24 | 311378616 |
| 25 | 143188574 |
| 26 | 24188010 |
| 27 | 246400 |
| 28 | 3897004032 |
| 29 | 1905067958 |
| 30 | 412136010 |
| 31 | 12812800 |
| 32 | 52626496896 |
| 33 | 27059601596 |
| 34 | 7053834788 |
| 35 | 438357920 |
[1,1,2,6,23,1,109,11,619,101,4108,932,31240,8975, 105,268028,91387,3465,2562156,991674,74970, 27011016,11514394,1391390,311378616,143188574, 24188010,246400,3897004032,1905067958,412136010, 12812800,52626496896,27059601596,7053834788, 438357920] |