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n | a(n) |
---|---|
0 | -1 |
1 | 1 |
2 | -9 |
3 | 31 |
4 | 311 |
5 | 1889 |
6 | 13599 |
7 | 91519 |
8 | 631721 |
9 | 4318271 |
10 | 29628279 |
11 | 202995649 |
12 | 1391561279 |
13 | 9537357311 |
14 | 65371447881 |
15 | 448058829919 |
16 | 3071050697399 |
17 | 21049268992289 |
18 | 144273903091551 |
19 | 988867867179391 |
20 | 6777801652728809 |
21 | 46455742430697599 |
22 | 318412398690263799 |
[-1,1,-9,31,311,1889,13599,91519,631721,4318271, 29628279,202995649,1391561279,9537357311, 65371447881,448058829919,3071050697399, 21049268992289,144273903091551,988867867179391, 6777801652728809,46455742430697599, 318412398690263799] |