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 | 420 |
| 2 | 660 |
| 3 | 840 |
| 4 | 1092 |
| 5 | 1155 |
| 6 | 1320 |
| 7 | 1380 |
| 8 | 1428 |
| 9 | 1540 |
| 10 | 1848 |
| 11 | 1995 |
| 12 | 3003 |
| 13 | 3315 |