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 | 7 |
| 4 | 31 |
| 5 | 211 |
| 6 | 2311 |
| 7 | 43891 |
| 8 | 78541 |
| 9 | 120121 |
| 10 | 870871 |
| 11 | 1381381 |
| 12 | 2282281 |
| 13 | 4084081 |
| 14 | 13123111 |
| 15 | 82192111 |
| 16 | 106696591 |
| 17 | 300690391 |
| 18 | 562582021 |
| 19 | 892371481 |
| 20 | 6915878971 |
| 21 | 71166625531 |
| 22 | 200560490131 |