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 | 8 |
| 2 | 43 |
| 3 | 218 |
| 4 | 1093 |
| 5 | 5468 |
| 6 | 27343 |
| 7 | 136718 |
| 8 | 683593 |
| 9 | 3417968 |
| 10 | 17089843 |
| 11 | 85449218 |
| 12 | 427246093 |
| 13 | 2136230468 |
| 14 | 10681152343 |
| 15 | 53405761718 |
| 16 | 267028808593 |
| 17 | 1335144042968 |
| 18 | 6675720214843 |
| 19 | 33378601074218 |
| 20 | 166893005371093 |