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 | 7 |
| 3 | 78 |
| 4 | 924 |
| 5 | 11005 |
| 6 | 131131 |
| 7 | 1562562 |
| 8 | 18619608 |
| 9 | 221872729 |
| 10 | 2643853135 |
| 11 | 31504364886 |
| 12 | 375408525492 |
| 13 | 4473397941013 |
| 14 | 53305366766659 |
| 15 | 635191003258890 |
| 16 | 7568986672340016 |
| 17 | 90192649064821297 |
| 18 | 1074742802105515543 |