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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 11 |
| 6 | 101 |
| 7 | 17977 |
| 8 | 10619863 |
| 9 | 6620830889 |
| 10 | 80630964769 |
| 11 | 228204732751 |
| 12 | 1171432692373 |
| 13 | 1398341745571 |
| 14 | 10963707205259 |
| 15 | 15285151248481 |
| 16 | 10657331232548839 |
| 17 | 790738119649411319 |
| 18 | 18987964267331664557 |
| 19 | 74878248419470886233 |
| 20 | 1394313503224447816939 |