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 | 54 |
| 3 | 750 |
| 4 | 4116 |
| 5 | 39930 |
| 6 | 92274 |
| 7 | 353736 |
| 8 | 617310 |
| 9 | 1606044 |
| 10 | 5121690 |
| 11 | 7149840 |
| 12 | 17323326 |
| 13 | 28946820 |
| 14 | 36732234 |
| 15 | 57310296 |
| 16 | 104511654 |
| 17 | 178679730 |
| 18 | 211092330 |
| 19 | 337456086 |
| 20 | 450967860 |
| 21 | 518170644 |
| 22 | 769140840 |
| 23 | 984617214 |
| 24 | 1395838620 |