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 | 5 |
| 2 | 73 |
| 3 | 1481 |
| 4 | 3965 |
| 5 | 46909 |
| 6 | 4154725 |
| 7 | 2542285 |
| 8 | 42877777 |
| 9 | 77493013 |
| 10 | 583422269 |
| 11 | 543086777 |
| 12 | 102892405433 |
| 13 | 865968783805 |
| 14 | 2679112443289 |
| 15 | 10532351275849 |
| 16 | 38768422373609 |
| 17 | 116987137407325 |
| 18 | 145223208505085 |
| 19 | 3837000286630513 |
| 20 | 6238790337745589 |