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 | 0 |
| 1 | 60 |
| 2 | 228 |
| 3 | 504 |
| 4 | 888 |
| 5 | 1380 |
| 6 | 1980 |
| 7 | 2688 |
| 8 | 3504 |
| 9 | 4428 |
| 10 | 5460 |
| 11 | 6600 |
| 12 | 7848 |
| 13 | 9204 |
| 14 | 10668 |
| 15 | 12240 |
| 16 | 13920 |
| 17 | 15708 |
| 18 | 17604 |
| 19 | 19608 |
| 20 | 21720 |
| 21 | 23940 |
| 22 | 26268 |
| 23 | 28704 |
| 24 | 31248 |
| 25 | 33900 |
| 26 | 36660 |
| 27 | 39528 |
| 28 | 42504 |
| 29 | 45588 |
| 30 | 48780 |
| 31 | 52080 |
| 32 | 55488 |
| 33 | 59004 |
| 34 | 62628 |
| 35 | 66360 |
| 36 | 70200 |
| 37 | 74148 |
| 38 | 78204 |
| 39 | 82368 |
| 40 | 86640 |