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 | 1 |
| 2 | 5 |
| 3 | 70 |
| 4 | 1973 |
| 5 | 94216 |
| 6 | 6851197 |
| 7 | 706335064 |
| 8 | 98105431657 |
| 9 | 17669939141440 |
| 10 | 4006704580744601 |
| 11 | 1117139031649249984 |
| 12 | 375701872315954792093 |
| 13 | 149988716080978525265776 |
| 14 | 70129434038848683974552365 |