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 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 7 |
| 6 | 9 |
| 7 | 19 |
| 8 | 24 |
| 9 | 26 |
| 10 | 39 |
| 11 | 49 |
| 12 | 79 |
| 13 | 99 |
| 14 | 124 |
| 15 | 126 |
| 16 | 159 |
| 17 | 199 |
| 18 | 249 |
| 19 | 319 |
| 20 | 399 |
| 21 | 499 |
| 22 | 624 |
| 23 | 626 |
| 24 | 639 |
| 25 | 799 |
| 26 | 999 |
| 27 | 1249 |
| 28 | 1279 |
| 29 | 1599 |
| 30 | 1999 |
| 31 | 2499 |
| 32 | 2559 |
| 33 | 3124 |
| 34 | 3126 |
| 35 | 3199 |
| 36 | 3999 |
| 37 | 4999 |
| 38 | 5119 |
| 39 | 6249 |
| 40 | 6399 |
| 41 | 7999 |
| 42 | 9999 |
| 43 | 10239 |
| 44 | 12499 |
| 45 | 12799 |
| 46 | 15624 |
| 47 | 15626 |
| 48 | 15999 |
| 49 | 19999 |
| 50 | 20479 |