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 | 48 |
| 2 | 3468 |
| 3 | 10101 |
| 4 | 16128 |
| 5 | 34188 |
| 6 | 140400 |
| 7 | 190476 |
| 8 | 216513 |
| 9 | 300625 |
| 10 | 334668 |
| 11 | 416768 |
| 12 | 484848 |
| 13 | 530901 |
| 14 | 2341548 |
| 15 | 2661653 |
| 16 | 16604400 |
| 17 | 33346668 |
| 18 | 59809776 |
| 19 | 101010101 |
| 20 | 3333466668 |
| 21 | 4848484848 |
| 22 | 4989086476 |
| 23 | 18516137328 |
| 24 | 30534177388 |
| 25 | 56734244853 |