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 | 1 |
| 1 | 31 |
| 2 | 2529 |
| 3 | 284191 |
| 4 | 37071329 |
| 5 | 5268723231 |
| 6 | 791682591201 |
| 7 | 123697944483359 |
| 8 | 19894672175770081 |
| 9 | 3271817054307112479 |
| 10 | 547678880100062177761 |
| 11 | 93006445178165754746399 |
| 12 | 15983911852747899752786401 |