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 | 41 |
| 3 | 337 |
| 4 | 2321 |
| 5 | 17537 |
| 6 | 134809 |
| 7 | 1023441 |
| 8 | 7759553 |
| 9 | 58921537 |
| 10 | 447447561 |
| 11 | 3397273553 |
| 12 | 25794057969 |
| 13 | 195847550081 |
| 14 | 1487017265657 |
| 15 | 11290490704977 |
| 16 | 85725445999521 |
| 17 | 650888811968321 |
| 18 | 4942012485147241 |
| 19 | 37523285458920273 |