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 | 2 |
| 2 | 34 |
| 3 | 488 |
| 4 | 9826 |
| 5 | 206252 |
| 6 | 4734304 |
| 7 | 113245568 |
| 8 | 2816649826 |
| 9 | 72001228052 |
| 10 | 1883210876284 |
| 11 | 50168588906768 |
| 12 | 1357245464138656 |
| 13 | 37198352117916992 |
| 14 | 1030920212982957184 |
| 15 | 28847760730478655488 |
| 16 | 814066783370083977826 |