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 | 4 |
| 2 | 12 |
| 3 | 20 |
| 4 | 36 |
| 5 | 60 |
| 6 | 108 |
| 7 | 180 |
| 8 | 252 |
| 9 | 324 |
| 10 | 540 |
| 11 | 756 |
| 12 | 972 |
| 13 | 1620 |
| 14 | 2268 |
| 15 | 2916 |
| 16 | 4860 |
| 17 | 6804 |
| 18 | 8748 |
| 19 | 14580 |
| 20 | 20412 |
| 21 | 26244 |
| 22 | 43740 |
| 23 | 61236 |
| 24 | 72900 |
| 25 | 78732 |
| 26 | 102060 |
| 27 | 131220 |
| 28 | 183708 |
| 29 | 218700 |
| 30 | 236196 |
| 31 | 306180 |
| 32 | 393660 |
| 33 | 551124 |
| 34 | 656100 |
| 35 | 708588 |
| 36 | 918540 |