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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 116 |
| 4 | 3229 |
| 5 | 129000 |
| 6 | 6776875 |
| 7 | 443200000 |
| 8 | 34766465625 |
| 9 | 3185000000000 |
| 10 | 333992093359375 |
| 11 | 39470976000000000 |
| 12 | 5192072114658203125 |
| 13 | 752537122540000000000 |
| 14 | 119176291179656982421875 |
| 15 | 20476256583680000000000000 |
| 16 | 3793880513498167242431640625 |
| 17 | 754086862404270000000000000000 |
[1,1,7,116,3229,129000,6776875,443200000, 34766465625,3185000000000,333992093359375, 39470976000000000,5192072114658203125, 752537122540000000000,119176291179656982421875, 20476256583680000000000000, 3793880513498167242431640625, 754086862404270000000000000000] |