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 | 3 |
| 3 | 16 |
| 4 | 57 |
| 5 | 112 |
| 6 | 160 |
| 7 | 272 |
| 8 | 404 |
| 9 | 20924 |
| 10 | 147153 |
| 11 | 274617 |
| 12 | 4409708 |
| 13 | 24881389 |
| 14 | 34850872 |
| 15 | 39808233 |
| 16 | 186610952 |
| 17 | 980830465 |
| 18 | 1777956414 |