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 | 31 |
| 2 | 311 |
| 3 | 3201 |
| 4 | 33241 |
| 5 | 346973 |
| 6 | 3633345 |
| 7 | 38128475 |
| 8 | 400712365 |
| 9 | 4215612885 |
| 10 | 44381119457 |
| 11 | 467467444891 |
| 12 | 4925548461045 |
| 13 | 51911345979157 |
| 14 | 547195680951947 |
| 15 | 5768641876348183 |
| 16 | 60819051384616763 |
| 17 | 641254077894118141 |