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 | 60 |
| 4 | 180 |
| 5 | 420 |
| 6 | 1740 |
| 7 | 1860 |
| 8 | 2520 |
| 9 | 3120 |
| 10 | 5100 |
| 11 | 8580 |
| 12 | 9660 |
| 13 | 16380 |
| 14 | 19800 |
| 15 | 36720 |
| 16 | 60900 |
| 17 | 71820 |
| 18 | 83640 |
| 19 | 100800 |
| 20 | 106260 |
| 21 | 135720 |
| 22 | 161880 |
| 23 | 163020 |
| 24 | 199080 |
| 25 | 205440 |
| 26 | 218460 |
| 27 | 273060 |
| 28 | 282000 |
| 29 | 337020 |
| 30 | 388080 |
| 31 | 431520 |
| 32 | 491040 |
| 33 | 531480 |
| 34 | 539760 |
| 35 | 552300 |