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) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 105 |
| 3 | 2023 |
| 4 | 44233 |
| 5 | 1043847 |
| 6 | 25921833 |
| 7 | 667598631 |
| 8 | 17669646729 |
| 9 | 477706767559 |
| 10 | 13136097627625 |
| 11 | 366267006096999 |
| 12 | 10331118817064521 |
| 13 | 294265822473133063 |
| 14 | 8452135970510611113 |
| 15 | 244534782069771034023 |
| 16 | 7119789572700157711113 |
| 17 | 208459073966103650720583 |