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 | 1 |
| 3 | 2 |
| 4 | 7 |
| 5 | 25 |
| 6 | 118 |
| 7 | 551 |
| 8 | 2812 |
| 9 | 14445 |
| 10 | 76092 |
| 11 | 403976 |
| 12 | 2167116 |
| 13 | 11698961 |
| 14 | 63544050 |
| 15 | 346821209 |
| 16 | 1901232614 |