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) |
|---|---|
| 1 | 17 |
| 2 | 177 |
| 3 | 1429 |
| 4 | 9705 |
| 5 | 58141 |
| 6 | 320481 |
| 7 | 1688101 |
| 8 | 8717049 |
| 9 | 44633821 |
| 10 | 227363409 |
| 11 | 1153594261 |
| 12 | 5835080169 |
| 13 | 29443836301 |
| 14 | 148292923329 |
| 15 | 745759583941 |
| 16 | 3745977788889 |
| 17 | 18798608421181 |
| 18 | 94267920012849 |
| 19 | 472439111692021 |