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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 9 |
| 4 | 11 |
| 5 | 75 |
| 6 | 86 |
| 7 | 161 |
| 8 | 569 |
| 9 | 3575 |
| 10 | 11294 |
| 11 | 14869 |
| 12 | 26163 |
| 13 | 171847 |
| 14 | 198010 |
| 15 | 963887 |
| 16 | 1161897 |
| 17 | 2125784 |
| 18 | 124457369 |
| 19 | 126583153 |
| 20 | 251040522 |
| 21 | 1130745241 |
| 22 | 1381785763 |
| 23 | 9421459819 |
| 24 | 10803245582 |
| 25 | 20224705401 |
| 26 | 71477361785 |
| 27 | 449088876111 |
| 28 | 1418743990118 |
| 29 | 1867832866229 |
[1,1,2,9,11,75,86,161,569,3575,11294,14869,26163, 171847,198010,963887,1161897,2125784,124457369, 126583153,251040522,1130745241,1381785763, 9421459819,10803245582,20224705401,71477361785, 449088876111,1418743990118,1867832866229] |