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 | 10 |
| 2 | 11 |
| 3 | 21 |
| 4 | 101 |
| 5 | 121 |
| 6 | 201 |
| 7 | 221 |
| 8 | 301 |
| 9 | 321 |
| 10 | 421 |
| 11 | 1001 |
| 12 | 1101 |
| 13 | 1121 |
| 14 | 1201 |
| 15 | 1221 |
| 16 | 1321 |
| 17 | 1421 |
| 18 | 2001 |
| 19 | 2101 |
| 20 | 2121 |
| 21 | 2201 |
| 22 | 2301 |
| 23 | 2321 |
| 24 | 2421 |
| 25 | 3101 |
| 26 | 3121 |
| 27 | 3201 |
| 28 | 3221 |
| 29 | 3301 |
| 30 | 3321 |
| 31 | 4101 |
| 32 | 4121 |
| 33 | 4221 |
| 34 | 4301 |
| 35 | 4421 |
| 36 | 5001 |
| 37 | 5101 |
| 38 | 5201 |
| 39 | 5221 |
| 40 | 5321 |
| 41 | 5421 |
| 42 | 6001 |
| 43 | 6121 |
| 44 | 6201 |
| 45 | 6221 |
| 46 | 6301 |
| 47 | 10001 |
| 48 | 10201 |
| 49 | 10221 |
| 50 | 10301 |
| 51 | 10321 |
| 52 | 10421 |
| 53 | 11001 |
| 54 | 11121 |
| 55 | 11221 |