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 | 1 |
| 2 | 6 |
| 3 | 57 |
| 4 | 741 |
| 5 | 12244 |
| 6 | 245755 |
| 7 | 5809875 |
| 8 | 158198200 |
| 9 | 4877852505 |
| 10 | 168055077875 |
| 11 | 6400217406500 |
| 12 | 267058149580823 |
| 13 | 12118701719205803 |
| 14 | 594291742526530761 |
| 15 | 31323687504696772151 |
| 16 | 1766116437541895988303 |
| 17 | 106080070002238888908150 |