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 | 3 |
| 2 | 7 |
| 3 | 25 |
| 4 | 33 |
| 5 | 37 |
| 6 | 73 |
| 7 | 75 |
| 8 | 223 |
| 9 | 235 |
| 10 | 237 |
| 11 | 273 |
| 12 | 327 |
| 13 | 357 |
| 14 | 535 |
| 15 | 537 |
| 16 | 553 |
| 17 | 577 |
| 18 | 723 |
| 19 | 727 |
| 20 | 735 |
| 21 | 777 |
| 22 | 2253 |
| 23 | 2257 |
| 24 | 2277 |
| 25 | 2323 |
| 26 | 2335 |
| 27 | 2355 |
| 28 | 2523 |
| 29 | 2527 |
| 30 | 2557 |
| 31 | 2575 |
| 32 | 2725 |
| 33 | 2755 |
| 34 | 2773 |
| 35 | 3223 |
| 36 | 3235 |
| 37 | 3325 |
| 38 | 3355 |
| 39 | 3727 |
| 40 | 3753 |
| 41 | 5233 |
| 42 | 5235 |
| 43 | 5253 |
| 44 | 5277 |
| 45 | 5325 |