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 | 2 |
| 3 | 3 |
| 4 | 42 |
| 5 | 329 |
| 6 | 633 |
| 7 | 1039 |
| 8 | 5689 |
| 9 | 26621 |
| 10 | 39245 |
| 11 | 1101875 |
| 12 | 1216075 |
| 13 | 40088584 |
| 14 | 67244920 |
| 15 | 104332211 |
| 16 | 549673265 |
| 17 | 777631064 |
| 18 | 19879301756 |