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 | 8 |
| 2 | 177 |
| 3 | 2530 |
| 4 | 18785 |
| 5 | 94932 |
| 6 | 397585 |
| 7 | 1647086 |
| 8 | 7861953 |
| 9 | 45136576 |
| 10 | 292475249 |
| 11 | 1996813914 |
| 12 | 13877119009 |
| 13 | 96951758924 |
| 14 | 678328486353 |
| 15 | 4747732369318 |
| 16 | 33233199005057 |
| 17 | 232630924325880 |
| 18 | 1628414210130481 |