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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 7 |
| 6 | 52 |
| 7 | 297 |
| 8 | 1994 |
| 9 | 14594 |
| 10 | 113794 |
| 11 | 991741 |
| 12 | 9199390 |
| 13 | 94105010 |
| 14 | 1015012796 |
| 15 | 11914379971 |
| 16 | 146974330141 |
| 17 | 1954701366709 |