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 | 2 |
| 2 | 8 |
| 3 | 35 |
| 4 | 205 |
| 5 | 1224 |
| 6 | 8169 |
| 7 | 58980 |
| 8 | 440312 |
| 9 | 3424506 |
| 10 | 27412679 |
| 11 | 224376048 |
| 12 | 1870585220 |
| 13 | 15834664872 |
| 14 | 135780321665 |
| 15 | 1177209242304 |
| 16 | 10304195697298 |
| 17 | 90948839353159 |
| 18 | 808675888577436 |