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| n | a(n) |
|---|---|
| 1 | 1344 |
| 2 | 8274 |
| 3 | 53100 |
| 4 | 380568 |
| 5 | 2791080 |
| 6 | 20842578 |
| 7 | 156410676 |
| 8 | 1177361316 |
| 9 | 8870853996 |
| 10 | 66873761742 |
| 11 | 504225673728 |
| 12 | 3802217597802 |
| 13 | 28672407717948 |
| 14 | 216221748724626 |
| 15 | 1630562796353904 |
| 16 | 12296378355562308 |
| 17 | 92729406038121768 |
| 18 | 699291160811405796 |
[1344,8274,53100,380568,2791080,20842578, 156410676,1177361316,8870853996,66873761742, 504225673728,3802217597802,28672407717948, 216221748724626,1630562796353904, 12296378355562308,92729406038121768, 699291160811405796] |