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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 198 |
| 3 | 84682 |
| 4 | 281721996 |
| 5 | 7392711987818 |
| 6 | 1528658402287559670 |
| 7 | 2490983667363798650708788 |
| 8 | 31987702603596066902310936860946 |
| 9 | 3237032742135065575663156511653859260726 |
| 10 | 2581445727611992619431296420645395411748335733438 |
[0,4,198,84682,281721996,7392711987818, 1528658402287559670,2490983667363798650708788, 31987702603596066902310936860946, 3237032742135065575663156511653859260726, 2581445727611992619431296420645395411748335733438] |