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 | 12345679 |
| 2 | 24691358 |
| 3 | 49382716 |
| 4 | 61728395 |
| 5 | 86419753 |
| 6 | 98765432 |
| 7 | 123456790 |
| 8 | 135802469 |
| 9 | 160493827 |
| 10 | 172839506 |
| 11 | 197530864 |
| 12 | 209876543 |
| 13 | 234567901 |
| 14 | 246913580 |
| 15 | 271604938 |
| 16 | 283950617 |
| 17 | 308641975 |
| 18 | 320987654 |
| 19 | 345679012 |
| 20 | 358024691 |
| 21 | 382716049 |