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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 81 |
| 3 | 5329 |
| 4 | 342225 |
| 5 | 21911761 |
| 6 | 1402427601 |
| 7 | 89755965649 |
| 8 | 45954960939217 |
| 9 | 188231512819194065 |
| 10 | 770996276517410920657 |
| 11 | 3158000748616424634669265 |
| 12 | 12935171066332946781853145297 |
| 13 | 52982460687699754593548358342865 |
| 14 | 217016158976818195107979529799293137 |
[0,1,81,5329,342225,21911761,1402427601, 89755965649,45954960939217,188231512819194065, 770996276517410920657,3158000748616424634669265, 12935171066332946781853145297, 52982460687699754593548358342865, 217016158976818195107979529799293137] |