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 | 15 |
| 3 | 25 |
| 4 | 31 |
| 5 | 37 |
| 6 | 99 |
| 7 | 133 |
| 8 | 219 |
| 9 | 393 |
| 10 | 409 |
| 11 | 427 |
| 12 | 495 |
| 13 | 517 |
| 14 | 519 |
| 15 | 723 |
| 16 | 873 |
| 17 | 883 |
| 18 | 885 |
| 19 | 903 |
| 20 | 979 |
| 21 | 1219 |
| 22 | 1251 |
| 23 | 1291 |
| 24 | 1357 |
| 25 | 1387 |
| 26 | 1389 |
| 27 | 1435 |
| 28 | 1459 |
| 29 | 1543 |
| 30 | 1575 |
| 31 | 1693 |
| 32 | 1777 |
| 33 | 1921 |
| 34 | 1965 |
| 35 | 1977 |
| 36 | 1983 |
| 37 | 1995 |
| 38 | 2211 |
| 39 | 2281 |
| 40 | 2301 |
| 41 | 2335 |
| 42 | 2343 |
| 43 | 2355 |
| 44 | 2445 |
| 45 | 2649 |
| 46 | 2815 |
| 47 | 3003 |