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 | 317 |
| 3 | 90492 |
| 4 | 7880456 |
| 5 | 270656150 |
| 6 | 4947097821 |
| 7 | 58002778967 |
| 8 | 490172624992 |
| 9 | 3223155968811 |
| 10 | 17382581357725 |
| 11 | 79840867013666 |
| 12 | 321169288917192 |
| 13 | 1155731257886192 |
| 14 | 3782368364610941 |
| 15 | 11406226119319725 |
| 16 | 32031530635953536 |
| 17 | 84493500676300117 |
| 18 | 210856844364222717 |