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 | 13 |
| 3 | 57 |
| 4 | 231 |
| 5 | 532 |
| 6 | 1497 |
| 7 | 2935 |
| 8 | 6031 |
| 9 | 10273 |
| 10 | 19680 |
| 11 | 29441 |
| 12 | 51261 |
| 13 | 74473 |
| 14 | 112721 |
| 15 | 159299 |
| 16 | 242763 |
| 17 | 317155 |
| 18 | 462930 |
| 19 | 598755 |