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 | 19 |
| 5 | 37 |
| 6 | 47 |
| 7 | 38693 |
| 8 | 44657 |
| 9 | 148091 |
| 10 | 178621 |
| 11 | 692521 |
| 12 | 4584379 |
| 13 | 262148693 |
| 14 | 347850691 |
| 15 | 502176491 |
| 16 | 1139746919 |
| 17 | 1387837067 |
| 18 | 5291181761 |
| 19 | 92653098679 |
| 20 | 202259581243 |