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 | 1 |
| 2 | 43 |
| 3 | 85 |
| 4 | 1891 |
| 5 | 5461 |
| 6 | 84883 |
| 7 | 314245 |
| 8 | 3879331 |
| 9 | 17077621 |
| 10 | 180009523 |
| 11 | 897269605 |
| 12 | 8457669571 |
| 13 | 46142992981 |
| 14 | 401365114963 |
| 15 | 2339370820165 |
| 16 | 19196705648611 |
| 17 | 117450280095541 |
| 18 | 923711917337203 |
| 19 | 5856623681349925 |
| 20 | 44652524209512451 |
| 21 | 290630718826209301 |
| 22 | 2166036735625732243 |