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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 24 |
| 6 | 93 |
| 7 | 427 |
| 8 | 2043 |
| 9 | 10412 |
| 10 | 54072 |
| 11 | 287121 |
| 12 | 1543567 |
| 13 | 8393603 |
| 14 | 46040030 |
| 15 | 254484780 |
| 16 | 1415837030 |
| 17 | 7922633039 |