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| n | a(n) |
|---|---|
| 30 | 1 |
| 31 | 18 |
| 32 | 93 |
| 33 | 431 |
| 34 | 1664 |
| 35 | 5982 |
| 36 | 20059 |
| 37 | 64473 |
| 38 | 199450 |
| 39 | 600429 |
| 40 | 1765198 |
| 41 | 5093281 |
| 42 | 14461282 |
| 43 | 40514663 |
| 44 | 112199665 |
| 45 | 307665178 |
| 46 | 836401955 |
| 47 | 2256766751 |
| 48 | 6048944297 |
| 49 | 16118777953 |
| 50 | 42729253427 |
| 51 | 112746836489 |
| 52 | 296263589093 |
| 53 | 775585850534 |
| 54 | 2023567436543 |
| 55 | 5263578982246 |
[1,18,93,431,1664,5982,20059,64473,199450,600429, 1765198,5093281,14461282,40514663,112199665, 307665178,836401955,2256766751,6048944297, 16118777953,42729253427,112746836489,296263589093, 775585850534,2023567436543,5263578982246] |