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 | 1 |
| 2 | 11 |
| 3 | 12 |
| 4 | 21 |
| 5 | 43 |
| 6 | 190 |
| 7 | 216 |
| 8 | 251 |
| 9 | 258 |
| 10 | 370 |
| 11 | 384 |
| 12 | 408 |
| 13 | 440 |
| 14 | 462 |
| 15 | 669 |
| 16 | 762 |
| 17 | 804 |
| 18 | 809 |
| 19 | 871 |
| 20 | 884 |
| 21 | 919 |
| 22 | 1188 |
| 23 | 1519 |
| 24 | 1520 |
| 25 | 1521 |
| 26 | 1790 |
| 27 | 1800 |
| 28 | 1875 |
| 29 | 2305 |
| 30 | 2312 |
| 31 | 2538 |
| 32 | 2997 |
| 33 | 3151 |
| 34 | 3210 |
| 35 | 3362 |
| 36 | 3474 |
| 37 | 4026 |
| 38 | 4561 |
| 39 | 5110 |
| 40 | 5490 |
| 41 | 5521 |
| 42 | 5569 |
| 43 | 5726 |
| 44 | 5762 |
| 45 | 5785 |
| 46 | 7216 |
| 47 | 7521 |