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 | 5 |
| 3 | 7 |
| 4 | 11 |
| 5 | 17 |
| 6 | 71 |
| 7 | 127 |
| 8 | 151 |
| 9 | 157 |
| 10 | 211 |
| 11 | 227 |
| 12 | 251 |
| 13 | 257 |
| 14 | 271 |
| 15 | 277 |
| 16 | 521 |
| 17 | 557 |
| 18 | 571 |
| 19 | 577 |
| 20 | 727 |
| 21 | 751 |
| 22 | 757 |
| 23 | 1117 |
| 24 | 1151 |
| 25 | 1171 |
| 26 | 1217 |
| 27 | 1277 |
| 28 | 1511 |
| 29 | 1571 |
| 30 | 1721 |
| 31 | 1777 |
| 32 | 2111 |
| 33 | 2221 |
| 34 | 2251 |
| 35 | 2521 |
| 36 | 2551 |
| 37 | 2557 |
| 38 | 2711 |
| 39 | 2777 |
| 40 | 5171 |
| 41 | 5227 |
| 42 | 5521 |
| 43 | 5527 |
| 44 | 5557 |
| 45 | 5711 |
| 46 | 5717 |
| 47 | 7121 |
| 48 | 7127 |
| 49 | 7151 |