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 | 987654103 |
| 2 | 987653201 |
| 3 | 987652301 |
| 4 | 987651403 |
| 5 | 987650413 |
| 6 | 987650341 |
| 7 | 987650231 |
| 8 | 987645103 |
| 9 | 987645013 |
| 10 | 987643021 |
| 11 | 987641203 |
| 12 | 987640321 |
| 13 | 987640123 |
| 14 | 987632501 |
| 15 | 987630421 |
| 16 | 987625403 |
| 17 | 987621053 |
| 18 | 987612053 |
| 19 | 987610423 |
| 20 | 987604523 |
| 21 | 987603521 |