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 | 1 |
| 2 | 2850 |
| 3 | 61776 |
| 4 | 79800 |
| 5 | 103740 |
| 6 | 145530 |
| 7 | 437580 |
| 8 | 719400 |
| 9 | 810901 |
| 10 | 828828 |
| 11 | 1050525 |
| 12 | 1185030 |
| 13 | 1788886 |
| 14 | 2031120 |
| 15 | 2162160 |
| 16 | 2821500 |
| 17 | 4250070 |
| 18 | 4959675 |
| 19 | 9217071 |
| 20 | 12298320 |
| 21 | 12457536 |
| 22 | 16356340 |
| 23 | 22899528 |
| 24 | 23334696 |
| 25 | 24890040 |
| 26 | 30728880 |
| 27 | 32800950 |
| 28 | 45158256 |
| 29 | 48565440 |
| 30 | 58487520 |