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 | 2 |
| 2 | 6 |
| 3 | 18 |
| 4 | 30 |
| 5 | 66 |
| 6 | 150 |
| 7 | 192 |
| 8 | 258 |
| 9 | 366 |
| 10 | 450 |
| 11 | 570 |
| 12 | 708 |
| 13 | 894 |
| 14 | 1044 |
| 15 | 1284 |
| 16 | 1422 |
| 17 | 1656 |
| 18 | 1902 |
| 19 | 2190 |
| 20 | 2460 |
| 21 | 2622 |