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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 19 |
| 6 | 17 |
| 7 | 1 |
| 8 | 2567 |
| 9 | 3350 |
| 10 | 128928 |
| 11 | 3706896 |
| 12 | 1290179 |
| 13 | 100170428 |
| 14 | 39080794 |
| 15 | 61998759572 |
| 16 | 7833495265 |
| 17 | 45119290746 |
| 18 | 581075656330 |
| 19 | 8672770990 |
| 20 | 15792702394898740 |
| 21 | 594681417768520250 |
| 22 | 25509154378676494 |
| 23 | 1642780344643617537867 |
| 24 | 480931910076867717575 |