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 | 4 |
| 2 | 22 |
| 3 | 178 |
| 4 | 2251 |
| 5 | 46663 |
| 6 | 1640572 |
| 7 | 100152049 |
| 8 | 10794383587 |
| 9 | 2079805452133 |
| 10 | 723492192295786 |
| 11 | 458149292979837523 |
| 12 | 531871667833026397222 |
| 13 | 1138955362720160687114704 |
| 14 | 4523369812874327770490887837 |