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 | 97 |
| 3 | 696 |
| 4 | 4784 |
| 5 | 32230 |
| 6 | 214978 |
| 7 | 1426566 |
| 8 | 9441417 |
| 9 | 62405645 |
| 10 | 412278981 |
| 11 | 2723566163 |
| 12 | 17996243101 |
| 13 | 118957645301 |
| 14 | 786700165122 |
| 15 | 5205396517853 |
| 16 | 34461624895701 |
| 17 | 228274455988134 |
| 18 | 1512920531980961 |
| 19 | 10032446308837778 |