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 | 13 |
| 2 | 157 |
| 3 | 1885 |
| 4 | 22621 |
| 5 | 271453 |
| 6 | 3257437 |
| 7 | 39089245 |
| 8 | 469070941 |
| 9 | 5628851293 |
| 10 | 67546215517 |
| 11 | 810554586205 |
| 12 | 9726655034461 |
| 13 | 116719860413533 |
| 14 | 1400638324962397 |
| 15 | 16807659899548765 |
| 16 | 201691918794585181 |