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 | 5 |
| 2 | 53 |
| 3 | 503 |
| 4 | 5003 |
| 5 | 50021 |
| 6 | 500009 |
| 7 | 5000011 |
| 8 | 50000017 |
| 9 | 500000003 |
| 10 | 5000000029 |
| 11 | 50000000021 |
| 12 | 500000000023 |
| 13 | 5000000000053 |
| 14 | 50000000000053 |
| 15 | 500000000000057 |
| 16 | 5000000000000023 |
| 17 | 50000000000000051 |
| 18 | 500000000000000021 |