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 | 11 |
| 2 | 77 |
| 3 | 407 |
| 4 | 1793 |
| 5 | 6875 |
| 6 | 23661 |
| 7 | 74503 |
| 8 | 217789 |
| 9 | 597311 |
| 10 | 1549977 |
| 11 | 3830619 |
| 12 | 9065485 |
| 13 | 20635967 |
| 14 | 45353033 |
| 15 | 96542523 |
| 16 | 199597519 |
| 17 | 401741989 |
| 18 | 788857795 |
| 19 | 1513922905 |
| 20 | 2844244975 |
| 21 | 5238604085 |
| 22 | 9471346755 |