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 | 11 |
| 3 | 101 |
| 4 | 1013 |
| 5 | 10037 |
| 6 | 100019 |
| 7 | 1000033 |
| 8 | 10000019 |
| 9 | 100000037 |
| 10 | 1000000033 |
| 11 | 10000000019 |
| 12 | 100000000019 |
| 13 | 1000000000039 |
| 14 | 10000000000037 |
| 15 | 100000000000031 |
| 16 | 1000000000000037 |
| 17 | 10000000000000079 |
| 18 | 100000000000000013 |
| 19 | 1000000000000000031 |
| 20 | 10000000000000000051 |
| 21 | 100000000000000000039 |