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 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 19 |
| 7 | 59 |
| 8 | 267 |
| 9 | 1380 |
| 10 | 9832 |
| 11 | 90842 |
| 12 | 1144061 |
| 13 | 19425052 |
| 14 | 445781050 |
| 15 | 13743625184 |
| 16 | 566756900370 |
| 17 | 31125101479652 |