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 | 3 |
| 2 | 7 |
| 3 | 31 |
| 4 | 211 |
| 5 | 2311 |
| 6 | 120121 |
| 7 | 4084081 |
| 8 | 106696591 |
| 9 | 892371481 |
| 10 | 71166625531 |
| 11 | 200560490131 |
| 12 | 29682952539241 |
| 13 | 2129751844690471 |
| 14 | 78496567990020181 |
| 15 | 8608456956238879741 |
| 16 | 97767475431570134191 |
| 17 | 9613801750771063195351 |