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) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 32 |
| 4 | 487 |
| 5 | 11113 |
| 6 | 335745 |
| 7 | 12607257 |
| 8 | 565877928 |
| 9 | 29553415078 |
| 10 | 1760584360722 |
| 11 | 117828762999498 |
| 12 | 8752769915058447 |
| 13 | 714626485356930711 |
| 14 | 63609663369881873031 |
| 15 | 6130647517448380412727 |
| 16 | 636052622643842997577302 |
| 17 | 70679525819378610579659532 |
| 18 | 8375262433274665594692923984 |