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 | 12 |
| 1 | 11 |
| 2 | 13 |
| 3 | 157 |
| 4 | 145 |
| 5 | 22621 |
| 6 | 133 |
| 7 | 3257437 |
| 8 | 20737 |
| 9 | 2987713 |
| 10 | 19141 |
| 11 | 67546215517 |
| 12 | 20593 |
| 13 | 9726655034461 |
| 14 | 2756293 |
| 15 | 394379701 |
| 16 | 429981697 |
| 17 | 201691918794585181 |
| 18 | 2984257 |
| 19 | 29043636306420266077 |
| 20 | 427016305 |