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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 8 |
| 5 | 18 |
| 6 | 94 |
| 7 | 1246 |
| 8 | 17732 |
| 9 | 10081266 |
| 10 | 63217342 |
| 11 | 1195118711985006 |
| 12 | 8140003186959622868813528 |
| 13 | 139669360584622467747806014 |
| 14 | 1324290912910022899017738237233285189213652972190967113265372469016533360 |
[1,1,2,8,18,94,1246,17732,10081266,63217342, 1195118711985006,8140003186959622868813528, 139669360584622467747806014, 13242909129100228990177382372332851892136529721909\ 67113265372469016533360] |