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 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 11 |
| 6 | 31 |
| 7 | 71 |
| 8 | 101 |
| 9 | 701 |
| 10 | 941 |
| 11 | 971 |
| 12 | 991 |
| 13 | 9001 |
| 14 | 9011 |
| 15 | 9221 |
| 16 | 9521 |
| 17 | 9941 |
| 18 | 70001 |
| 19 | 76001 |
| 20 | 97001 |
| 21 | 99401 |
| 22 | 99431 |
| 23 | 99571 |
| 24 | 99989 |
| 25 | 940001 |
| 26 | 973001 |
| 27 | 987101 |
| 28 | 993401 |
| 29 | 997811 |
| 30 | 999431 |