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 | 6 |
| 2 | 71 |
| 3 | 1259 |
| 4 | 29786 |
| 5 | 881649 |
| 6 | 31342599 |
| 7 | 1300942894 |
| 8 | 61754895021 |
| 9 | 3299892654169 |
| 10 | 196028028781586 |
| 11 | 12815511452714431 |
| 12 | 914381012515916401 |
| 13 | 70704482046773444414 |
| 14 | 5889818360271524031711 |
| 15 | 525844048516367206170019 |