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 | 77 |
| 2 | 3234 |
| 3 | 98098 |
| 4 | 2403401 |
| 5 | 50471421 |
| 6 | 942133192 |
| 7 | 16016264264 |
| 8 | 252256162158 |
| 9 | 3727785507446 |
| 10 | 52188997104244 |
| 11 | 697434779483988 |
| 12 | 8950413003377846 |
| 13 | 110847422580294862 |
| 14 | 1330169070963538344 |
| 15 | 15518639161241280680 |
| 16 | 176524520459119567735 |
| 17 | 1962537315692564605995 |
| 18 | 21369850770874592376390 |
| 19 | 228319984551975908021430 |