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 | 10 |
| 3 | 39 |
| 4 | 118 |
| 5 | 313 |
| 6 | 780 |
| 7 | 1789 |
| 8 | 4024 |
| 9 | 8793 |
| 10 | 18760 |
| 11 | 39577 |
| 12 | 82662 |
| 13 | 170677 |
| 14 | 350758 |
| 15 | 717189 |
| 16 | 1458604 |
| 17 | 2959003 |
| 18 | 5987586 |