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 | 6 |
| 2 | 90 |
| 3 | 1380 |
| 4 | 14580 |
| 5 | 21510 |
| 6 | 88830 |
| 7 | 97020 |
| 8 | 107100 |
| 9 | 112140 |
| 10 | 301890 |
| 11 | 401820 |
| 12 | 577710 |
| 13 | 689850 |
| 14 | 846210 |
| 15 | 857010 |
| 16 | 986160 |
| 17 | 1655130 |
| 18 | 2035740 |
| 19 | 2266320 |
| 20 | 2467290 |
| 21 | 2614710 |
| 22 | 3305310 |
| 23 | 3530220 |
| 24 | 3880050 |
| 25 | 3885420 |
| 26 | 5290440 |
| 27 | 5713800 |
| 28 | 6049890 |