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 | 11 |
| 1 | 35 |
| 2 | 251 |
| 3 | 2195 |
| 4 | 19691 |
| 5 | 177155 |
| 6 | 1594331 |
| 7 | 14348915 |
| 8 | 129140171 |
| 9 | 1162261475 |
| 10 | 10460353211 |
| 11 | 94143178835 |
| 12 | 847288609451 |
| 13 | 7625597484995 |
| 14 | 68630377364891 |
| 15 | 617673396283955 |
| 16 | 5559060566555531 |
| 17 | 50031545098999715 |
| 18 | 450283905890997371 |
| 19 | 4052555153018976275 |