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 | 4 |
| 2 | 9 |
| 3 | 25 |
| 4 | 39 |
| 5 | 49 |
| 6 | 69 |
| 7 | 119 |
| 8 | 121 |
| 9 | 129 |
| 10 | 159 |
| 11 | 219 |
| 12 | 249 |
| 13 | 259 |
| 14 | 329 |
| 15 | 339 |
| 16 | 403 |
| 17 | 469 |
| 18 | 669 |
| 19 | 679 |
| 20 | 1207 |
| 21 | 1329 |
| 22 | 1589 |
| 23 | 1703 |
| 24 | 2319 |
| 25 | 2321 |
| 26 | 2359 |
| 27 | 2649 |
| 28 | 2701 |
| 29 | 3039 |
| 30 | 3421 |
| 31 | 3503 |
| 32 | 3629 |
| 33 | 3639 |
| 34 | 3899 |
| 35 | 4303 |
| 36 | 4607 |
| 37 | 4839 |
| 38 | 5603 |
| 39 | 5739 |
| 40 | 6209 |
| 41 | 6401 |
| 42 | 6979 |
| 43 | 7269 |
| 44 | 7663 |
| 45 | 7819 |
| 46 | 8203 |
| 47 | 8519 |