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 | 50 |
| 3 | 60 |
| 4 | 250 |
| 5 | 3792 |
| 6 | 7600 |
| 7 | 376000 |
| 8 | 495475 |
| 9 | 625000 |
| 10 | 971582 |
| 11 | 66952741 |
| 12 | 93760000 |
| 13 | 177656344 |
| 14 | 3199268655 |
| 15 | 9062500000 |
| 16 | 10937600000 |
| 17 | 788138178328 |
| 18 | 860628177919 |
| 19 | 890625000000 |
| 20 | 2291665833333 |
| 21 | 2780225311054 |
| 22 | 2890625000000 |
| 23 | 71093760000000 |
| 24 | 128906250000000 |