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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 213 |
| 6 | 1003 |
| 7 | 1030 |
| 8 | 1420 |
| 9 | 1421 |
| 10 | 1422 |
| 11 | 1423 |
| 12 | 1424 |
| 13 | 2013 |
| 14 | 2130 |
| 15 | 2203 |
| 16 | 2243 |
| 17 | 2300 |
| 18 | 2301 |
| 19 | 2302 |
| 20 | 2303 |
| 21 | 2304 |
| 22 | 2311 |
| 23 | 2324 |
| 24 | 2413 |
| 25 | 2431 |
| 26 | 2443 |
| 27 | 3210 |
| 28 | 4021 |
| 29 | 4102 |
| 30 | 4112 |
| 31 | 4120 |
| 32 | 4121 |
| 33 | 4122 |
| 34 | 4123 |
| 35 | 4124 |
| 36 | 4331 |
| 37 | 4341 |
| 38 | 10003 |
| 39 | 10030 |
| 40 | 10031 |
| 41 | 10032 |