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 | 12 |
| 2 | 166 |
| 3 | 1784 |
| 4 | 17840 |
| 5 | 163504 |
| 6 | 1418549 |
| 7 | 11751784 |
| 8 | 94002810 |
| 9 | 730859800 |
| 10 | 5554472496 |
| 11 | 41437244784 |
| 12 | 304478259625 |
| 13 | 2209596042260 |
| 14 | 15871463933950 |
| 15 | 113044318064744 |
| 16 | 799558820643440 |
| 17 | 5622796403700080 |
| 18 | 39354459839661725 |