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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 18 |
| 5 | 30 |
| 6 | 42 |
| 7 | 60 |
| 8 | 78 |
| 9 | 108 |
| 10 | 144 |
| 11 | 204 |
| 12 | 264 |
| 13 | 342 |
| 14 | 456 |
| 15 | 618 |
| 16 | 798 |
| 17 | 1044 |
| 18 | 1392 |
| 19 | 1830 |
| 20 | 2388 |
| 21 | 3180 |
| 22 | 4146 |
| 23 | 5418 |
| 24 | 7032 |
| 25 | 9198 |
| 26 | 11892 |
| 27 | 15486 |
| 28 | 20220 |
| 29 | 26424 |
| 30 | 34422 |
| 31 | 44862 |
| 32 | 58446 |
| 33 | 76122 |
| 34 | 99276 |
| 35 | 129516 |
| 36 | 168546 |
| 37 | 219516 |
| 38 | 285750 |
| 39 | 372204 |
| 40 | 484446 |
| 41 | 630666 |
| 42 | 821154 |