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 | 19 |
| 3 | 31 |
| 4 | 83 |
| 5 | 109 |
| 6 | 199 |
| 7 | 251 |
| 8 | 409 |
| 9 | 571 |
| 10 | 631 |
| 11 | 683 |
| 12 | 829 |
| 13 | 1091 |
| 14 | 1489 |
| 15 | 1999 |
| 16 | 2341 |
| 17 | 2531 |
| 18 | 2971 |
| 19 | 3529 |
| 20 | 4621 |
| 21 | 4789 |
| 22 | 5051 |
| 23 | 7039 |
| 24 | 7211 |
| 25 | 7669 |
| 26 | 8779 |
| 27 | 9721 |
| 28 | 10459 |
| 29 | 10711 |
| 30 | 11171 |
| 31 | 13681 |
| 32 | 14851 |
| 33 | 15131 |
| 34 | 16069 |
| 35 | 16381 |
| 36 | 16883 |
| 37 | 17659 |
| 38 | 18731 |
| 39 | 20011 |
| 40 | 20359 |
| 41 | 21683 |
| 42 | 23251 |
| 43 | 24851 |