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 | 1 |
| 2 | 153 |
| 3 | 58234 |
| 4 | 1895145 |
| 5 | 198253934 |
| 6 | 27438555522 |
| 7 | 1949314526229 |
| 8 | 193553900967497 |
| 9 | 20574308184277971 |
| 10 | 1830607857363940042 |
| 11 | 178792253082742021463 |
| 12 | 17735061025562799941630 |
| 13 | 1679378707647721857218932 |
| 14 | 163105210594579645492072521 |
| 15 | 15894545877032388610890500803 |