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 | 2 |
| 2 | 13 |
| 3 | 107 |
| 4 | 1021 |
| 5 | 10061 |
| 6 | 100069 |
| 7 | 1000117 |
| 8 | 10000189 |
| 9 | 100000193 |
| 10 | 1000000181 |
| 11 | 10000000259 |
| 12 | 100000000193 |
| 13 | 1000000000303 |
| 14 | 10000000000411 |
| 15 | 100000000000487 |
| 16 | 1000000000000513 |
| 17 | 10000000000000931 |
| 18 | 100000000000000591 |
| 19 | 1000000000000000861 |
| 20 | 10000000000000000667 |