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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 521 |
| 2 | 783511 |
| 3 | 1380947751 |
| 4 | 2539295042077 |
| 5 | 4737855988840963 |
| 6 | 8887976555024756736 |
| 7 | 16707831453322853779391 |
| 8 | 31432720082490305392103161 |
| 9 | 59153025307098251197953889723 |
| 10 | 111332882561747103126702691033059 |
| 11 | 209551070271391563571916783497390709 |
[1,521,783511,1380947751,2539295042077, 4737855988840963,8887976555024756736, 16707831453322853779391, 31432720082490305392103161, 59153025307098251197953889723, 111332882561747103126702691033059, 209551070271391563571916783497390709] |