This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| 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 |