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 | 19 |
| 2 | 191 |
| 3 | 1527 |
| 4 | 76357 |
| 5 | 1527119 |
| 6 | 15271223 |
| 7 | 1221697411 |
| 8 | 488678993 |
| 9 | 244339494069 |
| 10 | 2443394944889 |
| 11 | 97735797766167 |
| 12 | 977357977713673 |
| 13 | 3909431910817547 |
| 14 | 39094319108242331 |
| 15 | 6255091057316833991 |